CHANG, Shih-Hsiang. Regions of existence and uniqueness for singular two-point boundary value problems. Mathematical Modelling and Analysis, [S. l.], v. 29, n. 4, p. 753–766, 2024. DOI: 10.3846/mma.2024.18638. Disponível em: https://journals.vilniustech.lt/index.php/MMA/article/view/18638. Acesso em: 29 may. 2025.