@article{SF_1985__31_134754,
     author = {Z. Goseki and H.J. Weinert},
     title = {On {P-injective} hulls of {S-sets.}},
     journal = {Semigroup forum},
     pages = {281--296},
     publisher = {mathdoc},
     volume = {31},
     year = {1985},
     zbl = {0599.20108},
     url = {http://geodesic.mathdoc.fr/item/SF_1985__31_134754/}
}