TIGAN, Gheorghe. DETECTION FUNCTION METHOD AND ITS APPLICATION TO A PERTURBED HAMILTONIAN SYSTEM. Matematichki Bilten, [S. l.], v. 33, n. 1, p. 81–90, 2009. Disponível em: https://bilten.smm.org.mk/index.php/bilten/article/view/1756. Acesso em: 14 aug. 2026.