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@article{AL_1963_2_5_a3, author = {Yu. L. Ershov and M. A. Taitslin}, title = {Undecidability of certain theories}, journal = {Algebra i logika}, pages = {37--41}, publisher = {mathdoc}, volume = {2}, number = {5}, year = {1963}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/AL_1963_2_5_a3/} }
Yu. L. Ershov; M. A. Taitslin. Undecidability of certain theories. Algebra i logika, Tome 2 (1963) no. 5, pp. 37-41. http://geodesic.mathdoc.fr/item/AL_1963_2_5_a3/