@article{SF_1974__6_133990,
     author = {E.M. Mogiljanskaja},
     title = {Non-isomorphic semigroups with isomorphic semigroups of subsets.},
     journal = {Semigroup forum},
     pages = {330--333},
     publisher = {mathdoc},
     volume = {6},
     year = {1974},
     zbl = {0267.20059},
     url = {http://geodesic.mathdoc.fr/item/SF_1974__6_133990/}
}