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@article{AL_1977_16_4_a7, author = {V. A. Roman'kov}, title = {Unsolvability of the problem of endomorphic reducibility in}, journal = {Algebra i logika}, pages = {457--471}, publisher = {mathdoc}, volume = {16}, number = {4}, year = {1977}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/AL_1977_16_4_a7/} }
V. A. Roman'kov. Unsolvability of the problem of endomorphic reducibility in. Algebra i logika, Tome 16 (1977) no. 4, pp. 457-471. http://geodesic.mathdoc.fr/item/AL_1977_16_4_a7/