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@article{DAN_1960_135_5_a9, author = {I. S. Ponizovskii}, title = {On homomorphisms of commutative semigroups}, journal = {Doklady Akademii Nauk}, pages = {1058--1060}, publisher = {mathdoc}, volume = {135}, number = {5}, year = {1960}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1960_135_5_a9/} }
I. S. Ponizovskii. On homomorphisms of commutative semigroups. Doklady Akademii Nauk, Tome 135 (1960) no. 5, pp. 1058-1060. http://geodesic.mathdoc.fr/item/DAN_1960_135_5_a9/