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@article{SF_1993__47_2_135278, author = {I. Levi and S. Seif}, title = {Range sets and partition sets in connection with congruences and algebraic invariants.}, journal = {Semigroup forum}, pages = {285--293}, publisher = {mathdoc}, volume = {47}, number = {2}, year = {1993}, zbl = {0783.20036}, url = {http://geodesic.mathdoc.fr/item/SF_1993__47_2_135278/} }
I. Levi; S. Seif. Range sets and partition sets in connection with congruences and algebraic invariants.. Semigroup forum, Tome 47 (1993) no. 2, pp. 285-293. http://geodesic.mathdoc.fr/item/SF_1993__47_2_135278/