TAARABTI, S. Nonlocal eigenvalue problems with indefinite weight. Methods of Functional Analysis and Topology, [S. l.], v. 26, n. 3, p. 283–294, 2020. DOI: https://doi.org/10.31392/MFAT-npu26_3.2020.09. Disponível em: https://zen.imath.kiev.ua/index.php/mfat/article/view/766. Acesso em: 13 dec. 2025.