@article{SF_1985__32_134778,
     author = {P.S. Venkatesan},
     title = {Certain subsemigroups of orthodox semigroups.},
     journal = {Semigroup forum},
     pages = {183--188},
     publisher = {mathdoc},
     volume = {32},
     year = {1985},
     zbl = {0571.20060},
     url = {http://geodesic.mathdoc.fr/item/SF_1985__32_134778/}
}