SAVCHIN, V.; TRINH, P. The variational approach to time discretization of Birkhoff’s equations for infinite-dimensional systems. Eurasian Mathematical Journal, [S. l.], v. 17, n. 2, p. 49–57, 2026. DOI: 10.32523/2077-9879-2026-17-2-49-57. Disponível em: https://emj.enu.kz/index.php/main/article/view/1024. Acesso em: 9 jul. 2026.