@article{GDZPPN001260731, title = {On weakly commutative poe-semigroups.}, journal = {Semigroup forum}, volume = {40}, year = {1990}, pages = {373-376}, zbl = {0708.06011}, url = {http://dml.mathdoc.fr/item/GDZPPN001260731} }
Kehayopulu, N.; P., Kiriakuli; Hanumantha Rao, S.; Lakshmi, P. On weakly commutative poe-semigroups.. Semigroup forum, Tome 40 (1990) pp. 373-376. http://gdmltest.u-ga.fr/item/GDZPPN001260731/