@article{SF_1979__17_134315,
     author = {S. Ligh and P. Jones},
     title = {Quasi ring-semigroups.},
     journal = {Semigroup forum},
     pages = {163--174},
     publisher = {mathdoc},
     volume = {17},
     year = {1979},
     zbl = {0402.20051},
     url = {http://geodesic.mathdoc.fr/item/SF_1979__17_134315/}
}