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@article{AL_1963_2_1_a4, author = {Yu. Sh. Gurevich and A. I. Kokorin}, title = {Universal equivalence of ordered {Abelian} groups}, journal = {Algebra i logika}, pages = {37--39}, publisher = {mathdoc}, volume = {2}, number = {1}, year = {1963}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/AL_1963_2_1_a4/} }
Yu. Sh. Gurevich; A. I. Kokorin. Universal equivalence of ordered Abelian groups. Algebra i logika, Tome 2 (1963) no. 1, pp. 37-39. http://geodesic.mathdoc.fr/item/AL_1963_2_1_a4/