| LJCR | 3101 |
| Jan de Heer and Steve Muir | 2058 |
| Dietmar Pree | 1224 |
| Colin Barker | 316 |
| A. West | 288 |
| Marco Meoli | 280 |
| Terenzio Lazzarotto | 273 |
| Alessandro Jurcovich | 268 |
| M. Wang | 193 |
| Michael Dambmann | 173 |
| Anastasios Tampakis | 102 |
| Stefano de Martino | 100 |
| Kamal Fadlaoui | 73 |
| Sveta Marjanovic | 62 |
| Flavio Perona | 60 |
| 777ch | 57 |
| Evandro De Simone | 53 |
| Jan de Heer | 42 |
| Kleszek | 40 |
| Mathias Liesener | 34 |
| Giovanni Acerbi | 33 |
| Rade Belic | 30 |
| Barnabas Toth | 25 |
| Kinski and Genivaldo Pereira | 25 |
| Jiang Yong Ming and Jiang Kun Xi | 25 |
| Fair_play | 24 |
| Andrei Ochmat | 23 |
| Chaoying Dai, Ben Li and Michel Toulouse | 21 |
| Antonio Franzese and Enzo Franzese | 20 |
| Felix Rodriguez Martin | 18 |
| Luciano Rezende | 18 |
| Enzo Franzese | 17 |
| Jiang Yong Ming | 16 |
| Adolf Muehl | 14 |
| Rade Belic and Jan de Heer | 12 |
| Vinicius Alves | 12 |
| Aline Marie Menezes Wanderlei | 11 |
| Weber Azevedo | 9 |
| Alessandro Jurcovich E Marco Meoli | 8 |
| Karsten Schlzel | 6 |
| W.h.mills and R.c.mullin | 5 |
| Roy Gourgi | 5 |
| W.h.mills | 4 |
| Jan de Heer and Rade Belic | 4 |
| Marco Meoli E Alessandro Jurcovich | 3 |
| E. Franzese, A. Jurcovich E M. Meoli | 3 |
| Iliya Bluskov | 2 |
| Claus Friis | 2 |
| Bluskov and Hamalainen | 2 |
| Guenther Schlegl | 2 |
| Sveta Marjanovicandanastasios Tampakis | 2 |
| Daryl Burns | 2 |
| Mario Pina | 2 |
| Enzo Franzese E Alessandro Jurcovich | 2 |
| Namyk Kemal Erdogan | 1 |
| W. H. Mills | 1 |
| Karsten Scholzel | 1 |
| Adolf Muehl and Dietmar Pree | 1 |
| Igor Lazebnik | 1 |
| Tung Le | 1 |
| Riccardo Bertolo and Francesco Santisi | 1 |
| A. Tampakis and A. Jurchovich | 1 |
| Jaera | 1 |
| Kinsky and Genivaldo Pereira | 1 |
| Jose Milan Vega | 1 |
| Dietmar Pree and Adolf Muehl | 1 |
| Rade Belic and Dragan Stojiljkovic | 1 |
| Rade Belic and Dietmar Pree | 1 |
| A. Betten, R. Laue and A. Wassermann | 1 |
| Riccardo Bertolo and Jan de Heer | 1 |
| Dietmar Pree and Rade Belic | 1 |
| Alexandre Spaeth | 1 |
| Chaoying Dai, Ben Li and Michel Toulouse, Reduced By Rade Belic | 1 |
| Steve Muir | 1 |
| Bigmax | 1 |
| Carmine Iorio | 1 |
| Marco Meoli-alessandro Jurcovich | 1 |
| Alessandro Jurcovich E Claudio Tosi | 1 |
| Anastasios Tampakis and Sveta Marjanovic | 1 |
| Alternatywa | 1 |
| Alessandro Brozzetti | 1 |
| Moshe Milshtein | 1 |
| Spada Mauro 2202 | 1 |
| Bluskov-greig-heinrich | 1 |
| Marco Meoli and Alessandro Jurcovich | 1 |
| Dbr58 | 1 |
| Marco Meoli E Enzo Franzese | 1 |
| Enzo Franzese E Marco Meoli | 1 |
| Alessandro Jurcovich E Enzo Franzese | 1 |
| A. Jurcovich E G. Acerbi | 1 |
| LJCR | 53528 |
| Jan de Heer and Steve Muir | 6136 |
| Enzo Franzese | 3000 |
| Dietmar Pree | 2611 |
| Terenzio Lazzarotto | 2430 |
| Michael Dambmann | 2254 |
| Tommaso Tanto | 1799 |
| A. West | 1763 |
| JCD Article | 1632 |
| Flavio Perona | 1539 |
| Rade Belic | 1442 |
| Marco Meoli | 1150 |
| Alessandro Jurcovich | 838 |
| M. Wang | 743 |
| Jiang Yong Ming and Jiang Kun Xi | 631 |
| Kleszek | 565 |
| Rade Belic and Dragan Stojiljkovic | 539 |
| Stefano de Martino | 484 |
| Colin Barker | 457 |
| Sveta Marjanovic | 362 |
| Anastasios Tampakis | 344 |
| Gerald Unger | 343 |
| E. Franzese, A. Jurcovich E M. Meoli | 326 |
| Evandro De Simone | 325 |
| Kinski and Genivaldo Pereira | 278 |
| Aline Marie Menezes Wanderlei | 263 |
| Felix Rodriguez Martin | 244 |
| Barnabas Toth | 228 |
| Fair_play | 225 |
| 777ch | 219 |
| Pio Leonardi | 194 |
| Antonio Franzese and Enzo Franzese | 148 |
| Giovanni Acerbi | 140 |
| Steve Muir | 131 |
| Jan de Heer | 129 |
| Francisco Carlos | 127 |
| Luciano Rezende | 100 |
| Vinicius Alves | 95 |
| A. Jurcovich, M. Meoli E E. Franzese | 91 |
| Kamal Fadlaoui | 89 |
| Jiang Yong Ming | 85 |
| Alessandro Jurcovich E Marco Meoli | 57 |
| Nino Aspesi | 54 |
| Weber Azevedo | 54 |
| Mathias Liesener | 47 |
| Dietmar Pree and Rade Belic | 41 |
| Jose Milan Vega | 40 |
| Chaoying Dai, Ben Li and Michel Toulouse | 39 |
| Jaera | 38 |
| Rade Belic and Jan de Heer | 38 |
| Enzo Franzese E Alessandro Jurcovich | 37 |
| Andrei Ochmat | 31 |
| Gino Grazin and Rade Belic | 31 |
| Marco Meoli E Alessandro Jurcovich | 29 |
| Alessandro Jurcovich E Enzo Franzese | 28 |
| Marco Meoli-alessandro Jurcovich-enzo Franzese | 28 |
| Dragan Stojiljkovic | 27 |
| Enzo Franzese E Marco Meoli | 26 |
| Antonio Franzese | 20 |
| Jan de Heer and Rade Belic | 19 |
| Adolf Muehl | 17 |
| A. Jurcovich, E. Franzese E M. Meoli | 17 |
| Roy Gourgi | 14 |
| Weberazevedo | 13 |
| Flavio.perona | 11 |
| Kabila | 11 |
| Tarullig | 11 |
| Igor Lazebnik | 10 |
| Alternatywa | 10 |
| Iliya Bluskov | 9 |
| Sildemar Castro | 8 |
| Marco Meoli and Alessandro Jurcovich | 8 |
| Marco Meoli-alessandro Jurcovich | 8 |
| Claudio Tosi | 8 |
| Riccardo Bertolo | 7 |
| Daryl Burns | 7 |
| Enzo Franzese E Dietmar Pree | 7 |
| Mario Pina | 6 |
| Karsten Schlzel | 6 |
| Sveta Marjanovic and Anastasios Tampakis | 6 |
| Hillary | 6 |
| W.h.mills and R.c.mullin | 5 |
| Enzo Franzese E Weber Azevedo | 5 |
| Anastasios Tampakis and Sveta Marjanovic | 5 |
| Riccardo Bertolo and Francesco Santisi | 4 |
| Ivan Baptiste and Rade Belic | 4 |
| Rade Belic and Dietmar Pree | 4 |
| Leopio | 4 |
| W.h.mills | 4 |
| Sveta Marjanovicandanastasios Tampakis | 4 |
| Enzo Franzese E Nino Aspesi | 4 |
| Fctv | 4 |
| Claus Friis | 3 |
| Michael Damb | 3 |
| Marco Meoli Alessandro Jurcovich | 3 |
| Alessandro Jurcovich E Stefano de Martino | 3 |
| Marco Meoli E Enzo Franzese | 3 |
| Enzo Franzese E Michael Dambmann | 3 |
| K | 3 |
| Giovanni Acerbi and Terenzio Lazzarotto | 3 |
| Marco Marco | 3 |
| Alessandro Jurcovich E Free | 3 |
| Riccardo Bertolo and Jan de Heer | 2 |
| Genivaldo Pereira | 2 |
| Ricardo Ramalho | 2 |
| Paolo Ferlaino | 2 |
| Bluskov and Hamalainen | 2 |
| Adolf Muehl and Dietmar Pree | 2 |
| Karsten Scholzel | 2 |
| Meoli Marco | 2 |
| Tarullig / Aspesi | 2 |
| Alessandro Jurcovich - Nino Aspesi | 2 |
| Marco Meoli E Dietmar Pree | 2 |
| Weber Azevedo E Enzo Franzese | 2 |
| Enzo Franzese E Terenzio Lazzarotto | 2 |
| Enzo Franzese E Prize | 2 |
| Alessandro Jurcovich-marco Meoli-enzo Franzese | 2 |
| Spada Mauro | 2 |
| Alessandro Jurcovich E Claudio Tosi | 2 |
| Alessandro Jurcovich E Giovanni Acerbi | 2 |
| Covboy | 2 |
| Alessandro Brozzetti | 2 |
| Moshe Milshtein | 2 |
| A. Betten, R. Laue and A. Wassermann | 1 |
| Namyk Kemal Erdogan | 1 |
| Alexandre Spaeth | 1 |
| Fernando Villanova | 1 |
| Steve Muir, Improving One By Jan de Heer | 1 |
| Chaoying Dai, Ben Li and Michel Toulouse, Reduced By Rade Belic | 1 |
| Jose Maria Milan | 1 |
| Grzesiek | 1 |
| Jan de Heer With Ininuga By Uros Boltin | 1 |
| Peter Rosendahl | 1 |
| Daniel Morais | 1 |
| Adolf Muehl and Rade Belic And Dietmar Pree | 1 |
| Lazzarotto Terenzio | 1 |
| Kinsky and Genivaldo Pereira | 1 |
| Gerasorte Online | 1 |
| W. H. Mills | 1 |
| Leo Pio | 1 |
| Qlatino | 1 |
| Simple Construction: Doubled (50,6,2) and Deleted An Element | 1 |
| Simple Construction: Doubled (50,8,2) and Deleted An Element | 1 |
| Simple Construction: Doubled (50,10,2) and Deleted An Element | 1 |
| Simple Construction: Doubled (50,11,2) and Deleted An Element | 1 |
| Simple Construction: Doubled (50,8,3) and Deleted An Element | 1 |
| Simple Construction: Doubled (50,9,3) and Deleted An Element | 1 |
| Simple Construction: Doubled (50,10,3) and Deleted An Element | 1 |
| Simple Construction: Doubled (50,11,3) and Deleted An Element | 1 |
| Simple Construction: Doubled (50,10,4) and Deleted An Element | 1 |
| 42066 | 1 |
| Quadrupling Construction | 1 |
| Altopalato Bellariva | 1 |
| Aspesi - Paramini - Tosi | 1 |
| Aspesi - Paramini - Marjanovic | 1 |
| Nino Aspesi - Moreno Paramini | 1 |
| Paramini and Kabila and Aspesi | 1 |
| Tung Le | 1 |
| Marjanovic Jurcovich Aspesi | 1 |
| Marco Meoli Sveta Marjanovic | 1 |
| A. Tampakis and A. Jurchovich | 1 |
| Nino Aspesi - Alessandro Jurcovich | 1 |
| Edi8 | 1 |
| Tarullig/aspesi | 1 |
| Mario Tessuto | 1 |
| Alessandro Jurcovich-sveta Marjanovic-marco Meoli | 1 |
| J | 1 |
| Nino Aspesi E Enzo Franzese | 1 |
| Spada Mauro Bellariva | 1 |
| Marco Meoli - Alessandro Jurcovich - Enzo Franzese | 1 |
| A. Jurcovich, M. Meoli E E. Franzese E M. Meoli | 1 |
| Ricardo Sepulveda and Anastasios Tampakis | 1 |
| Bigmax | 1 |
| Kl | 1 |
| M. Meoli, A. Jurcovich E E. Franzese | 1 |
| Alessandro Jurcovich Marco Meoli Enzo Franzese | 1 |
| Enzo Franzese E Flavio Perona | 1 |
| Carmine Iorio | 1 |
| Dolce Remi | 1 |
| Bellariva | 1 |
| Tarullig and Kabila | 1 |
| Kair_play | 1 |
| Play_fair | 1 |
| A. Jurcovich, G. Acerbi E M. Meoli | 1 |
| Giovanni Acerbi and Alessandro Jurcovich | 1 |
| Aline Marie Menezes Wanderlei and Evandro De Simone | 1 |
| Don Backi | 1 |
| Paramini Moreno | 1 |
| Arrastre | 1 |
| Weber Azevedoandaline Marie | 1 |
| Socmel 1° | 1 |
| Altetnatywa | 1 |
| Spada Mauro 2202 | 1 |
| Bluskov-greig-heinrich | 1 |
| Dbr58 | 1 |
| A. Jurcovich, M. Meoli E G. Acerbi | 1 |
| A. Jurcovich E G. Acerbi | 1 |
| Private tools | 1878 |
| Local search | 1419 | unknown | 1396 |
| Simple construction | 870 |
| Dynamic programming construction | 772 |
| Multiple | 598 |
| Lex covering | 258 |
| Constructed | 226 |
| Wang construction | 193 |
| Dynamic programming covering | 132 |
| Private tool | 126 |
| Simulated annealing | 115 |
| Wheeling systems checker 4 | 86 |
| Simple construction: multiple | 70 |
| Wheel generator | 68 |
| Simple construction: combined | 64 |
| Simple construction: induced | 62 |
| Lexicographic greedy covering | 57 |
| Dynamic construction | 43 |
| Jymccdd programming | 41 |
| Dynamic programming | 37 |
| Local search - bluskov pdo technique | 37 |
| Korelacje_777ch v5 | 37 |
| Wheel generator v2 | 35 |
| Korelacje_777ch__fairplay_v4 | 34 |
| Simple construction: deleted element | 31 |
| Tabu search | 27 |
| Random greedy covering | 23 |
| Cyclic covering found by search program | 20 |
| Lottocp systems generator | 20 |
| Cyclic covering | 18 |
| Simple construction: added element to c(v-1,k-1,t) covering | 18 |
| Steiner quadruple system | 16 |
| Wsc 4 + wg 2.3 | 16 |
| Simple optimization | 15 |
| Sidorenko construction | 12 |
| Wsc v4 | 12 |
| Constructed using simulated annealing | 11 |
| Cyclic construction | 10 |
| Simple combine | 10 |
| Design is based on c (v - 1, k, t) = b - v | 10 |
| Cyclic covering found by a search program | 9 |
| See paper by jrj abel et al. in discrete mathematics 307 (2007) | 9 |
| Simulated annealing covering | 9 |
| Group orbit covering design | 9 |
| Nurmela and ostergard simulated annealing cover | 8 |
| Affine geometry covering | 7 |
| Nurmela-ostergard symmetric covering | 7 |
| Induced | 6 |
| Exhaustive search | 6 |
| Covering provided by rade belic | 6 |
| Steiner triple system | 5 |
| See jct series a 49, 308-322 (1988) | 5 |
| Extraction/remainder | 5 |
| Sidorenko method | 5 |
| Wo - otimizador de rodas | 5 |
| Using wsc4 | 5 |
| Based on work by iliya bluskov | 5 |
| See journal | 4 |
| Constructed using difference families | 4 |
| Simple construction: added element to c(v,k-1,t) covering | 4 |
| Cyclic symmetry | 4 |
| Hanani construction (see canadian journal | 4 |
| Nurmela-ostergard simulated annealing covering design | 4 |
| Shortened covering | 4 |
| Colex greedy covering | 3 |
| Mills, jcta 13 (1972) pp. 55-78. | 3 |
| Found by a hill-climbing program | 3 |
| Steiner system | 3 |
| Covering found by a hill-climbing program | 3 |
| Cyclic steiner system | 3 |
| Projective plane | 3 |
| Mills, ars combinatoria, 8 (1979) pg. 247 | 3 |
| Mills, ars combinatoria, 8 (1979) pg. 231 | 3 |
| Mills, ars combinatoria 8 (1979) pp. 199-315 | 3 |
| Reverse engineering smaller systems | 3 |
| Covering provided by alex sidorenko (personal communication) | 3 |
| Using ininuga, by uros boltin | 3 |
| Covering pairs by quads: mills, jcta 15:138-166, 1973. | 2 |
| Constructed using difference sets | 2 |
| Constructed by simulated annealing | 2 |
| Constructed using dynamic programming | 2 |
| Communicated by d. todorov, using pg(2,3) | 2 |
| Communicated by d. todorov, using pg(2,4) | 2 |
| Affine plane | 2 |
| Steiner system (derived) | 2 |
| Wheel generator, based on jan de heer and steve muir work | 2 |
| Covering provided by john cock (personal communication) | 2 |
| Several methods (including sa) | 2 |
| Jcd 1998, pp. 21-41 | 2 |
| Nurmela-ostergard simulated annealing covering | 2 |
| Hill-climb on affine orbits | 2 |
| Covering provided by dietmar pree | 2 |
| Hill-climb on cyclic orbits | 2 |
| Simple method construction | 2 |
| Wheeling systems checker | 2 |
| Thanks to giovanni acerbi for his contribution | 2 |
| From 1-flat on 42 numbers | 1 |
| Mill, jcta 15 (1973) 138-166 | 1 |
| See paper in journal | 1 |
| Cyclic | 1 |
| Td(4,12) & 4 * c(15,4,2) | 1 |
| Td(4,15) and 4 * modified c(18,4,2) | 1 |
| Using rc(45,3,2) | 1 |
| Using a (v,4,22*)-pbd and c(22,4,2) | 1 |
| Td(4,18) + 4 * c(21,4,2) | 1 |
| Td(4,19) & 4 * c(21,4,2) | 1 |
| Using rc(54,3,2) | 1 |
| Using rc(60,3,2) by lamken and mills (1993) | 1 |
| Td(4,23) + 4 * c(25,4,2) | 1 |
| Td(4,24) + 4 * c(26,4,2) | 1 |
| Td(4,24) + 4*c(27,4,2) | 1 |
| Covering pairs by quints, mills & mullin, jcta 49:308-322, 1988 | 1 |
| Covering pairs by quints, mullin, jcmcc 2:133-146, 1987 | 1 |
| Cyclic covering on z5*z7 | 1 |
| Cyclic covering on z3*z17 with one point at infinity | 1 |
| Using a 4−gdd | 1 |
| Using resolvable c(68,4,2), see lamken, mullen and rees (jcd, 1997-1) | 1 |
| Using resolvable c(72,4,2), see lamken, mullen and rees (jcd, 1997-1) | 1 |
| Covering found by john rawson | 1 |
| Produced with covermaster (by john rawson), wheelgenerator (by anastasios tampakis) and private tools. | 1 |
| See j comb des , vol. 15, no. 6, pp. 511-533, 2007 | 1 |
| Using td(6,15) and 6*modified c(18,6,2,2) | 1 |
| Using td(6,16) and 6*modified c(18,6,2,2) | 1 |
| Communicated by d. todorov | 1 |
| Using a resolvable c(54,6,2,2) | 1 |
| From td(7,12) and 7*c(13,7,2,2,5) with 2 holes | 1 |
| From td(7,12) and 7*c(15,7,2,2,6) with 3 holes | 1 |
| Td(7,13) and 7 * modified c(15,7,2) | 1 |
| From 57,8,2 | 1 |
| From td(9,9) and 9*c(14,9,2,2,3) with 5 holes | 1 |
| Mills, ars combinatoria, 8 (1979) pg. 254 | 1 |
| Mills, ars combinatoria, 8 (1979) pg. 270 | 1 |
| Doubling resolvable c(25,5,2) | 1 |
| Tripling a resolvable c(25,5,2) | 1 |
| Steiner system, taken | 1 |
| Doubling c(18,4,3) | 1 |
| Reverse engineering | 1 |
| Simple construction: | 1 |
| Doubling c(30,4,3) | 1 |
| See w h mills in congressus numerantium 10 (1974) pp563-581 | 1 |
| Doubling c(36,4,3) | 1 |
| Doubling c(42,4,3) | 1 |
| Covering produced by floyd l. oats, using a ranking and reduction process | 1 |
| Group theory | 1 |
| Covering | 1 |
| Privat tools | 1 |
| Quadrupling construction | 1 |
| Covering provided by konstantin katskov, found by exhaustive search | 1 |
| Private tools - assisted by wheel generator | 1 |
| Cyclic symmetrical | 1 |
| Combinado | 1 |
| Ex 8 | 1 |
| Covering found by rade belic | 1 |
| Marco meoli | 1 |
| Superfluous-element hill climb on a covering | 1 |
| Ininuga (by uros boltin) | 1 |
| Ex 16 | 1 |
| Ex 13 | 1 |
| Ex 15 | 1 |
| See designs, codes and cryptography 17 (1999), 181-186 | 1 |
| Method | 1 |
| Based on work by chaoying dai, ben li and michel toulouse | 1 |
| Block-array construction (gordon, patashnik, petro and taylor) | 1 |
| Ex 28 | 1 |
| Ex 1988 | 1 |
| Superfluous-element hill climb on a random greedy covering | 1 |
| Block covering | 1 |
| Ex 54 | 1 |
| Ex 62 | 1 |
| Chain rule (64,32,6)x(32,24,6) | 1 |
| Normal methods | 1 |
| Quadrupling a full c(10,5,5) | 1 |
| Replicate 4 columns | 1 |
| Unusual methods | 1 |
| Construction combined | 1 |
| Of,24,15,7,165 | 1 |
| Of,28,10,6,2899 | 1 |
| Ininuga | 1 |
| Wheel generator, based on chaoying dai, ben li and michel toulouse work | 1 |
| Based on work by kleszek | 1 |
| Wheel generator and covermaster | 1 |
| Korelacje_777ch__fairplay_v2 | 1 |
| Simple construction: doubled (50,8,2) and deleted an element | 1 |
| Simple construction: doubled (50,10,2) and deleted an element | 1 |
| Simple construction: doubled (50,11,2) and deleted an element | 1 |
| Simple construction: doubled (50,8,3) and deleted an element | 1 |
| Wheel generator and private tools | 1 |
| Wheel generator, covermaster and wo - otimizador de rodas | 1 |
| Wheeling systems checker, wheel generator and ininuga | 1 |
| Private tools, covermaster and wheelgenerator | 1 |
| 777ch software + wsc v4 | 1 |
| Personale | 1 |
| From the article infinite classes | 1 |
| Using wheel generator ex.502 dietmar pree | 1 |
| Using wheel generator ex.16250 | 1 |
| Using wsc4 & wg | 1 |
| Using wheel generator | 1 |