Numeric-Symbolic Computations in the Study of Central Configurations in the Planar Newtonian Four-Body Problem. - Evgenii A. Grebenikov; Ersain V. Ikhsanov; Alexander N. Prokopenya (CASC, 2006)

Studying the Stability of the Second Order Non-autonomous Hamiltonian System. - Evgenii A. Grebenikov; Ersain V. Ikhsanov; Alexander N. Prokopenya (CASC, 2007)