@article{GDZPPN001264613, title = {The bifree regular E-solid semigroups.}, journal = {Semigroup forum}, volume = {53}, year = {1996}, pages = {61-82}, zbl = {0841.20053}, url = {http://dml.mathdoc.fr/item/GDZPPN001264613} }
Szendrei, M.B. The bifree regular E-solid semigroups.. Semigroup forum, Tome 53 (1996) pp. 61-82. http://gdmltest.u-ga.fr/item/GDZPPN001264613/