@article{GDZPPN001249487, title = {A property of orthodox semigroups.}, journal = {Semigroup forum}, volume = {7}, year = {1974}, pages = {86-91}, zbl = {0293.20056}, url = {http://dml.mathdoc.fr/item/GDZPPN001249487} }
Eberhart, Carl. A property of orthodox semigroups.. Semigroup forum, Tome 7 (1974) pp. 86-91. http://gdmltest.u-ga.fr/item/GDZPPN001249487/