Kostyrko V F

Publications in Math-Net.Ru

1. On the decidability problem for Ackermann's case
   
   Sibirsk. Mat. Zh., 6:2 (1965),  342–363
2. The reduction-class $\forall \exists ^n\forall $
   
   Algebra i Logika. Sem., 3:5-6 (1964),  45–55
3. On an error in the paper of I. I. Žegalkin “The solvability problem on finite classes”
   
   Algebra i Logika. Sem., 1:5 (1962),  31–36