PROKOPENYA, A. N. Determination of the stability boundaries for the hamiltonian systems with periodic coefficients. Mathematical Modelling and Analysis, [S. l.], v. 10, n. 2, p. 191–204, 2005. DOI: 10.3846/13926292.2005.9637281. Disponível em: https://journals.vilniustech.lt/index.php/MMA/article/view/9673. Acesso em: 9 may. 2025.