Groups with handles of order different from three

We obtain a test for the unsimplicity of an infinite group.Translated from Ukrainskyi Matematychnyi Zhurnal, Vol. 56, No. 8, pp. 1030–1042, August, 2004.     

Embedding theorems for groups with involutions and a characterization of Chernikov groups

Translated from Algebra i Logika, Vol. 27, No. 1, pp. 100–121, January–February, 1988.     

Supplement to the paper "characterization of a certain class of chernikov groups" (algebra and logic,vol. 25, no. 3, pp. 206–217, 1987)

Translated from Algebra i Logika, Vol. 29, No. 1, pp. 124–125, January–February, 1990.