GORIUNOV, A. Multi-interval Sturm-Liouville problems with distributional coefficients. Methods of Functional Analysis and Topology, [S. l.], v. 26, n. 2, p. 103–110, 2020. DOI: https://doi.org/10.31392/MFAT-npu26_2.2020.02. Disponível em: https://zen.imath.kiev.ua/index.php/mfat/article/view/750. Acesso em: 13 dec. 2025.