Characteristics of Eigenfunctions and Eigenvalues of a Fourth Order Differential Equations with Spectral Parameter in the Boundary Conditions . JOURNAL OF UNIVERSITY OF BABYLON for Pure and Applied Sciences, [S. l.], v. 30, n. 2, p. 97–107, 2022. DOI: 10.29196/jubpas.v30i2.4187. Disponível em: https://www.journalofbabylon.com/index.php/JUBPAS/article/view/4187. Acesso em: 3 may. 2025.