КРАСНОДЕМБСЬКИЙ, Адам Михайлович. PERIODICITY OF DECISIONS OF SOME SYSTEM A FEW NONLINEAR DIFFERENTIAL EQUALIZATIONS OF AN EVEN ORDER. PRECARPATHIAN BULLETIN OF THE SHEVCHENKO SCIENTIFIC SOCIETY. Number, [S. l.], n. 1(21), p. 45–50, 2019. Disponível em: https://pvntsh.nung.edu.ua/index.php/number/article/view/180. Acesso em: 6 dec. 2025.