MARCHUK, N.; SEMENYSHYNA, I. ABOUT THE INVARIANT TORS OF CALCULATION SYSTEMS OF DIFFERENTIAL EQUATIONS CONTAINING DEVIATIONS OF A DISCRETE ARGUMENT. European Science, [S. l.], v. 1, n. sge09-01, p. 95–108, 2022. DOI: 10.30890/2709-2313.2022-09-01-012. Disponível em: https://desymp.promonograph.org/index.php/sge/article/view/sge09-01-012. Acesso em: 24 nov. 2024.