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@article{DAN_1965_165_5_a8, author = {B. M. Shain}, title = {Semigroups of rectangular binary relations}, journal = {Doklady Akademii Nauk}, pages = {1011--1014}, publisher = {mathdoc}, volume = {165}, number = {5}, year = {1965}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1965_165_5_a8/} }
B. M. Shain. Semigroups of rectangular binary relations. Doklady Akademii Nauk, Tome 165 (1965) no. 5, pp. 1011-1014. http://geodesic.mathdoc.fr/item/DAN_1965_165_5_a8/