- On orthogonality of binary operations and squares.
- On the lattice of closed classes of modules.
- Lie algebras of the operators and three-dimensional polynomial differential systems.
**On a Functional Equation with a Group Isotopy Property.**- Left exact radicals in module categories over principal ideal domains.
- An approximate solution of the Fredholm type equation of the second kind for any λ ≠ 0
- On a criterion of normality for mappings.
- Strong Stability of Linear Symplectic Actions and the Orbit Method.