@article{GDZPPN001252992, title = {Generalized Commutative semigroups.}, journal = {Semigroup forum}, volume = {18}, year = {1979}, pages = {65-74}, zbl = {0396.20041}, url = {http://dml.mathdoc.fr/item/GDZPPN001252992} }
Mannepalli, V.L.; Nagore, C.S.H. Generalized Commutative semigroups.. Semigroup forum, Tome 18 (1979) pp. 65-74. http://gdmltest.u-ga.fr/item/GDZPPN001252992/