Baranetskij, Y.O., Kalenyuk, P.I. and Kolyasa, L.I. (2018) “Spectral properties of nonself-adjoint nonlocal boundary-value problems for the operator of differentiation of even order”, Ukrains’kyi Matematychnyi Zhurnal, 70(6), pp. 739–751. Available at: https://umj.imath.kiev.ua/index.php/umj/article/view/1592 (Accessed: 26 April 2025).