@article{2695, author = {Bernstein, Neil}, title = {Standard cohomology of semigroups}, journal = {Portugaliae mathematica}, volume = {32}, year = {1973}, pages = {21-23}, zbl = {0279.20054}, mrnumber = {0318266}, language = {en}, url = {http://dml.mathdoc.fr/item/2695} }
Bernstein, Neil. Standard cohomology of semigroups. Portugaliae mathematica, Tome 32 (1973) pp. 21-23. http://gdmltest.u-ga.fr/item/2695/