@article{GDZPPN001261053, title = {Injective hulls of S-systems over a Clifford semigroup.}, journal = {Semigroup forum}, volume = {43}, year = {1991}, pages = {19-24}, zbl = {0727.20045}, url = {http://dml.mathdoc.fr/item/GDZPPN001261053} }
Park, Y.S.; Kim, J.P. Injective hulls of S-systems over a Clifford semigroup.. Semigroup forum, Tome 43 (1991) pp. 19-24. http://gdmltest.u-ga.fr/item/GDZPPN001261053/