1.
Neamaty A, Khalili Y. THE EIGENVALUE PROBLEMS FOR DIFFERENTIAL PENCILS ON THE HALF LINE. J. Nonlinear Anal. Optim. [internet]. 2012 May 8 [cited 2026 Sep. 2];3(2):111-4. available from: https://ph03.tci-thaijo.org/index.php/jnao/article/view/2661