1. Kourov Notebook, Unsolved Problems in Group Theory [in Russian], 6th ed., Novosibirsk (1978).
2. Dnestro Notebook, Unsolved Problems in the Theory of Rings and Modules [in Russian], 3rd ed., Novosibirsk (1982).
3. Yu. A. Bakhturin, "Homomorphisms in certain classes of soluble Lie algebras," 15th All-Union Algebraic Conf., Part 1, Krasnoyarsk (1979).
4. Yu. A. Bakhturin, "On homomorphisms of soluble Lie algebras," J. London Math. Soc.,20, No. 3, 415–422 (1979).
5. V. I. Epanchintsev and G. P. Kukin, "The problem of equality in varieties of groups containing ," Algebra Logika,18, No. 3, 259–285 (1979).