@article{GDZPPN001249142, title = {Note on a certain class of orthodox semigroups.}, journal = {Semigroup forum}, volume = {7}, year = {1974}, pages = {180-188}, zbl = {0255.20040}, url = {http://dml.mathdoc.fr/item/GDZPPN001249142} }
Yamada, M. Note on a certain class of orthodox semigroups.. Semigroup forum, Tome 7 (1974) pp. 180-188. http://gdmltest.u-ga.fr/item/GDZPPN001249142/