@article{GDZPPN001257838,
title = {Certain subsemigroups of orthodox semigroups.},
journal = {Semigroup forum},
volume = {31},
year = {1985},
pages = {183-188},
zbl = {0571.20060},
url = {http://dml.mathdoc.fr/item/GDZPPN001257838}
}
Venkatesan, P.S. Certain subsemigroups of orthodox semigroups.. Semigroup forum, Tome 31 (1985) pp. 183-188. http://gdmltest.u-ga.fr/item/GDZPPN001257838/