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@article{AL_1962_1_3_a1, author = {A. I. Kokorin and V. M. Kopytov}, title = {Certain classes of ordered groups}, journal = {Algebra i logika}, pages = {21--23}, publisher = {mathdoc}, volume = {1}, number = {3}, year = {1962}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/AL_1962_1_3_a1/} }
A. I. Kokorin; V. M. Kopytov. Certain classes of ordered groups. Algebra i logika, Tome 1 (1962) no. 3, pp. 21-23. http://geodesic.mathdoc.fr/item/AL_1962_1_3_a1/