@article{1103039697, author = {Fort, M. K. and Hedlund, G. A.}, title = {Minimal coverings of pairs by triples.}, journal = {Pacific J. Math.}, volume = {8}, number = {4}, year = {1958}, pages = { 709-719}, language = {en}, url = {http://dml.mathdoc.fr/item/1103039697} }
Fort, M. K.; Hedlund, G. A. Minimal coverings of pairs by triples.. Pacific J. Math., Tome 8 (1958) no. 4, pp. 709-719. http://gdmltest.u-ga.fr/item/1103039697/