@article{GDZPPN00125295X, title = {Homogeneous quotients of semigroups.}, journal = {Semigroup forum}, volume = {16}, year = {1978}, pages = {455-462}, zbl = {0392.20043}, url = {http://dml.mathdoc.fr/item/GDZPPN00125295X} }
Osondu, K.E. Homogeneous quotients of semigroups.. Semigroup forum, Tome 16 (1978) pp. 455-462. http://gdmltest.u-ga.fr/item/GDZPPN00125295X/