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@article{DAN_1983_272_2_a11, author = {I. I. Parovichenko}, title = {Algebraic systems containing semigroups of ultrafilter type}, journal = {Doklady Akademii Nauk}, pages = {304--307}, publisher = {mathdoc}, volume = {272}, number = {2}, year = {1983}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1983_272_2_a11/} }
I. I. Parovichenko. Algebraic systems containing semigroups of ultrafilter type. Doklady Akademii Nauk, Tome 272 (1983) no. 2, pp. 304-307. http://geodesic.mathdoc.fr/item/DAN_1983_272_2_a11/