@article{GDZPPN001260391, title = {A new approach in the theory of orthodox semigroups.}, journal = {Semigroup forum}, volume = {40}, year = {1990}, pages = {257-296}, zbl = {0705.20052}, url = {http://dml.mathdoc.fr/item/GDZPPN001260391} }
Szendrei, M.B.; Kadourek, J. A new approach in the theory of orthodox semigroups.. Semigroup forum, Tome 40 (1990) pp. 257-296. http://gdmltest.u-ga.fr/item/GDZPPN001260391/