Bingelė K, Štikonas A. Investigation of a discrete Sturm–Liouville problem with two-point nonlocal boundary condition and natural approximation of a derivative in boundary condition. MMA [Internet]. 2024Mar.26 [cited 2024May15];29(2):309–330. Available from: https://gc.vgtu.lt/index.php/MMA/article/view/19829