ISLAM, M. Z. An asymptotic method for periodic solution of nonlinear autonomous systems modeled by second order hyperbolic type partial differential equation. Rajshahi University Journal of Science and Engineering, [S. l.], v. 53, p. 1–9, 2026. DOI: 10.64102/rujse.0748. Disponível em: https://journal.ru.ac.bd/rujse/article/view/206.. Acesso em: 15 aug. 2026.