Voir la notice de l'article provenant de la source European Digital Mathematics Library
@article{PORMA_1973__32_1_115185, author = {Bernstein, Neil}, title = {Standard cohomology of semigroups}, journal = {Portugaliae mathematica}, pages = {21--23}, publisher = {mathdoc}, volume = {32}, number = {1}, year = {1973}, mrnumber = {0318266}, zbl = {0279.20054}, language = {en}, url = {http://geodesic.mathdoc.fr/item/PORMA_1973__32_1_115185/} }
Bernstein, Neil. Standard cohomology of semigroups. Portugaliae mathematica, Tome 32 (1973) no. 1, pp. 21-23. http://geodesic.mathdoc.fr/item/PORMA_1973__32_1_115185/