Ibadzadeh, C. G., & Nabiev, I. (2017). Reconstruction of the Sturm – Liouville operator with nonseparated
boundary conditions and a spectral parameter in the boundary condition.
Ukrains’kyi Matematychnyi Zhurnal,
69(9), 1217-1223.
https://umj.imath.kiev.ua/index.php/umj/article/view/1771