Mel'nichuk I L

Publications in Math-Net.Ru

1. The word problem in varieties of semigroups, rings and Lie algebras
   
   Sibirsk. Mat. Zh., 27:6 (1986),  144–156
2. Undecidability of the problems of equality and divisibility in certain varieties of semigroups
   
   Algebra Logika, 23:4 (1984),  430–438