Acikgoz, M., Araci, S. and Şen, E. (2016) “Spectral problem for Sturm – Liouville operator with retarded argument which contains a spectral parameter in boundary condition”, Ukrains’kyi Matematychnyi Zhurnal, 68(8), pp. 1102-1114. Available at: https://umj.imath.kiev.ua/index.php/umj/article/view/1905 (Accessed: 28March2024).