- Oleg Lyubimtsev, Askar Tuganbaev, “Centrally essential semigroup algebras”, Communications in Algebra, 51, № 6, 2023,
2321 
- Askar Tuganbaev, “Centrally Essential Rings and Semirings”, Mathematics, 10, № 11, 2022,
1867 - Oleg Lyubimtsev, Askar Tuganbaev, “Lie nilpotent centrally essential rings”, Int. J. Algebra Comput., 34, № 07, 2024,
1091