@article{GDZPPN001253891, title = {F-regular and F-orthodox semigroups.}, journal = {Semigroup forum}, volume = {20}, year = {1980}, pages = {331-346}, zbl = {0432.20052}, url = {http://dml.mathdoc.fr/item/GDZPPN001253891} }
Edwards, C.C. F-regular and F-orthodox semigroups.. Semigroup forum, Tome 20 (1980) pp. 331-346. http://gdmltest.u-ga.fr/item/GDZPPN001253891/