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@article{AL_1978_17_1_a1, author = {A. P. Zamyatin}, title = {A nonabelian variety of groups has an undecidable elementary}, journal = {Algebra i logika}, pages = {20--27}, publisher = {mathdoc}, volume = {17}, number = {1}, year = {1978}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/AL_1978_17_1_a1/} }
A. P. Zamyatin. A nonabelian variety of groups has an undecidable elementary. Algebra i logika, Tome 17 (1978) no. 1, pp. 20-27. http://geodesic.mathdoc.fr/item/AL_1978_17_1_a1/