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@article{AL_1970_9_3_a4, author = {V. P. Klassen}, title = {The occurrence problem for a certain class of groups}, journal = {Algebra i logika}, pages = {306--312}, publisher = {mathdoc}, volume = {9}, number = {3}, year = {1970}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/AL_1970_9_3_a4/} }
V. P. Klassen. The occurrence problem for a certain class of groups. Algebra i logika, Tome 9 (1970) no. 3, pp. 306-312. http://geodesic.mathdoc.fr/item/AL_1970_9_3_a4/