TUZ, M. Boundary values for an eigenvalue problem with a singular potential. An International Journal of Optimization and Control: Theories & Applications (IJOCTA), [S. l.], v. 7, n. 3, p. 293–300, 2017. DOI: 10.11121/ijocta.01.2017.00507. Disponível em: http://ijocta.org/index.php/files/article/view/507. Acesso em: 5 jan. 2025.