MARASI, Hamidreza; AKBARFAM, Aliasghar Jodayree. Dual equation and inverse problem for an indefinite Sturm–Liouville problem with m turning points of even order. Mathematical Modelling and Analysis, [S. l.], v. 17, n. 5, p. 618–629, 2012. DOI: 10.3846/13926292.2012.732972. Disponível em: https://journals.vilniustech.lt/index.php/MMA/article/view/4898. Acesso em: 2 jun. 2025.