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@article{AL_1962_1_3_a0, author = {P. G. Kontorovich and V. M. Busarkin}, title = {$\theta $-isolated complexes in a group}, journal = {Algebra i logika}, pages = {4--20}, publisher = {mathdoc}, volume = {1}, number = {3}, year = {1962}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/AL_1962_1_3_a0/} }
P. G. Kontorovich; V. M. Busarkin. $\theta $-isolated complexes in a group. Algebra i logika, Tome 1 (1962) no. 3, pp. 4-20. http://geodesic.mathdoc.fr/item/AL_1962_1_3_a0/