Dmitry Treschev

Stable periodic motions in the problem on passage through a separatrix.

A. Neishtadt, A. Neishtadt, V. Sidorenko, 1997, Chaos.

Lagrangian tori near resonances of near-integrable Hamiltonian systems

A. Neishtadt, D. Treschev, A. G. Medvedev, 2013, 1311.0132.