@article{SF_1994__49_2_135349,
     author = {G. Song},
     title = {Identities of orthodox semigroup rings.},
     journal = {Semigroup forum},
     pages = {239--246},
     publisher = {mathdoc},
     volume = {49},
     number = {2},
     year = {1994},
     zbl = {0815.20065},
     url = {http://geodesic.mathdoc.fr/item/SF_1994__49_2_135349/}
}