MITEVSKA, M. Kujumdzieva-Nikoloska, J. TRIGONOMETRIC SOLUTIONS FOR SOME ORDINARY DIFERENTIAL EQUATIONS OF THE SECOND ORDER. Matematichki Bilten, [S. l.], v. 26, n. 1, 2002. Disponível em: https://bilten.smm.org.mk/index.php/bilten/article/view/1670. Acesso em: 13 jun. 2026.