@article{GDZPPN001253492,
title = {The ring of quotients of R(S).},
journal = {Semigroup forum},
volume = {18},
year = {1979},
pages = {271-278},
zbl = {0419.16001},
url = {http://dml.mathdoc.fr/item/GDZPPN001253492}
}
Luedeman, J.K.; Bate, J.A. The ring of quotients of R(S).. Semigroup forum, Tome 18 (1979) pp. 271-278. http://gdmltest.u-ga.fr/item/GDZPPN001253492/