ALBAYRAK, I.; ADIGÜZELOV, E.; BAYRAMOĞLU, M. The second regularized trace formula for the Sturm-Liouville problem with spectral parameter in a boundary condition. Methods of Functional Analysis and Topology, [S. l.], v. 6, n. 3, p. 1–8, 2000. Disponível em: https://zen.imath.kiev.ua/index.php/mfat/article/view/122. Acesso em: 17 dec. 2025.