Neamaty, A. and Khalili, Y. (2012) “THE EIGENVALUE PROBLEMS FOR DIFFERENTIAL PENCILS ON THE HALF LINE”, Journal of Nonlinear Analysis and Optimization: Theory & Applications, 3(2), pp. 111-114. Available at: http://www.math.sci.nu.ac.th/ojs302/index.php/jnao/article/view/85 (Accessed: 9December2021).