@article{SF_1996__52_3_135446,
     author = {Z. Goseki},
     title = {Multiplicative closed maps on the set of {S-subsets} of an {S-set.}},
     journal = {Semigroup forum},
     pages = {181--190},
     publisher = {mathdoc},
     volume = {52},
     number = {3},
     year = {1996},
     zbl = {0849.20048},
     url = {http://geodesic.mathdoc.fr/item/SF_1996__52_3_135446/}
}