Groups with finite classes of conjugate subgroups.
Supplements of direct powers in cartesian powers.
On Characteristic Subgroups of Free Groups.
Identical relations in groups. I.
Ascending Verbal and Frattini Series.
Isomorphism of Sylow Subgroups of Infinite Groups.
On varieties generated by a finitely generated group.
Some Unsolvable Problems about Elements and Subgroups of Groups.
Wreath products and varieties of groups.
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