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Жавлиева, А. 2026. Hamiltonian formalism of periodic collisionless motion of particles in a field. BULLETIN OF THE L.N. GUMILYOV EURASIAN NATIONAL UNIVERSITY. PHYSICS. ASTRONOMY SERIES. 155, 2 (Jun. 2026), 82–91. DOI:https://doi.org/10.32523/2616-6836-2026-155-2-82-91.