Voir la notice de l'article provenant de la source Czech Digital Mathematics Library
@article{KYB_1973__9_5_a3, author = {Nieminen, U. J.}, title = {The block plan problem. {A} graphtheoretic approach}, journal = {Kybernetika}, pages = {--373}, publisher = {mathdoc}, volume = {09}, number = {5}, year = {1973}, mrnumber = {0351431}, zbl = {0264.90030}, language = {en}, url = {http://geodesic.mathdoc.fr/item/KYB_1973__9_5_a3/} }
Nieminen, U. J. The block plan problem. A graphtheoretic approach. Kybernetika, Tome 09 (1973) no. 5, p. 373. http://geodesic.mathdoc.fr/item/KYB_1973__9_5_a3/