Eigenvalues of Fourth-Order Singular Sturm-Liouville Boundary Value Problems. Journal of Nonlinear Modeling and Analysis, [S. l.], v. 2, n. 4, p. 485–493, 2024. DOI: 10.12150/jnma.2020.485. Disponível em: https://gsp.tricubic.dev/jnma/article/view/13572. Acesso em: 14 mar. 2026.