@article{SF_1993__46_1_135208,
     author = {G.V.S. Acharyulu},
     title = {Matrix representable so-rings.},
     journal = {Semigroup forum},
     pages = {37--47},
     publisher = {mathdoc},
     volume = {46},
     number = {1},
     year = {1993},
     zbl = {0766.06017},
     url = {http://geodesic.mathdoc.fr/item/SF_1993__46_1_135208/}
}