@article{SF_1979__18_134356,
     author = {J.K. Luedeman and J.A. Bate},
     title = {The ring of quotients of {R(S).}},
     journal = {Semigroup forum},
     pages = {271--278},
     year = {1979},
     volume = {18},
     zbl = {0419.16001},
     url = {http://geodesic.mathdoc.fr/item/SF_1979__18_134356/}
}