PAVLENKO, V. N.; CHIZH, E. A. Existence Theorem for One Class of Strongly Resonance Boundary-Value Problems of Elliptic Type with Discontinuous Nonlinearities. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 57, n. 1, p. 102–110, 2005. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/3577. Acesso em: 6 dec. 2025.