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@article{AL_1969_8_3_a3, author = {G. T. Kozlov and A. I. Kokorin}, title = {An elementary theory of torsion-free abelian groups with a}, journal = {Algebra i logika}, pages = {320--334}, publisher = {mathdoc}, volume = {8}, number = {3}, year = {1969}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/AL_1969_8_3_a3/} }
G. T. Kozlov; A. I. Kokorin. An elementary theory of torsion-free abelian groups with a. Algebra i logika, Tome 8 (1969) no. 3, pp. 320-334. http://geodesic.mathdoc.fr/item/AL_1969_8_3_a3/