SIDENKO, N. R. Averaging of the Dirichlet problem for a special hyperbolic Kirchhoff equation. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 58, n. 2, p. 236–249, 2006. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/3449. Acesso em: 27 apr. 2025.