@article{GDZPPN001254871, title = {A note on generalized commutative semigroups.}, journal = {Semigroup forum}, volume = {23}, year = {1981}, pages = {311-324}, zbl = {0467.20050}, url = {http://dml.mathdoc.fr/item/GDZPPN001254871} }
Venu Raju, K.; Hanumanthachari, J. A note on generalized commutative semigroups.. Semigroup forum, Tome 23 (1981) pp. 311-324. http://gdmltest.u-ga.fr/item/GDZPPN001254871/