Voir la notice de l'article provenant de la source European Digital Mathematics Library
@article{SF_1980__21_134443, author = {K.E. Osondu}, title = {The universal group of homogeneous quotients.}, journal = {Semigroup forum}, pages = {143--152}, publisher = {mathdoc}, volume = {21}, year = {1980}, zbl = {0467.20046}, url = {http://geodesic.mathdoc.fr/item/SF_1980__21_134443/} }
K.E. Osondu. The universal group of homogeneous quotients.. Semigroup forum, Tome 21 (1980), pp. 143-152. http://geodesic.mathdoc.fr/item/SF_1980__21_134443/