@article{GDZPPN001265709, title = {E-free objects in E-vari\'et\'es of inverse rings.}, journal = {Semigroup forum}, volume = {54}, year = {1997}, pages = {375-380}, zbl = {0880.20049}, url = {http://dml.mathdoc.fr/item/GDZPPN001265709} }
Loyola, J.O. E-free objects in E-variétés of inverse rings.. Semigroup forum, Tome 54 (1997) pp. 375-380. http://gdmltest.u-ga.fr/item/GDZPPN001265709/