AlievB. A. (2010) “Solvability of the boundary-value problem for the second-order elliptic differential-operator equation with spectral parameter in the equation and boundary conditions”, Ukrains’kyi Matematychnyi Zhurnal, 62(1), pp. 3 - 14. Available at: https://umj.imath.kiev.ua/index.php/umj/article/view/2839 (Accessed: 23November2024).