@article{GDZPPN001257587, title = {On P-injective hulls of S-sets.}, journal = {Semigroup forum}, volume = {31}, year = {1985}, pages = {281-296}, zbl = {0599.20108}, url = {http://dml.mathdoc.fr/item/GDZPPN001257587} }
Goseki, Z.; Weinert, H.J. On P-injective hulls of S-sets.. Semigroup forum, Tome 31 (1985) pp. 281-296. http://gdmltest.u-ga.fr/item/GDZPPN001257587/