@article{05164273, title = {On semilattices of groups whose arrows are epimorphisms.}, journal = {International Journal of Mathematics and Mathematical Sciences}, volume = {2006}, year = {2006}, doi = {10.1155/IJMMS/2006/30673}, zbl = {1145.20029}, language = {en}, url = {http://dml.mathdoc.fr/item/05164273} }
Abdallah, M.El-Ghali M.; Gab-Alla, L.N.; Elagan, Sayed K.M. On semilattices of groups whose arrows are epimorphisms.. International Journal of Mathematics and Mathematical Sciences, Tome 2006 (2006) . doi : 10.1155/IJMMS/2006/30673. http://gdmltest.u-ga.fr/item/05164273/