POLAT, N.; KILIC, A. Existence of solutions to higher order semilinear hyperbolic equations with damping term. International Journal of Open Problems in Computer Science and Mathematics, [S. l.], v. 18, n. 3, p. 23–39, 2025. Disponível em: https://ijopcm.icsrs.uk/index.php/journal/article/view/29. Acesso em: 21 jun. 2026.