Čiupaila R, Jesevičiūtė Ž., Sapagovas M. On the Eigenvalue Problem for One-Dimensional Differential Operator with Nonlocal Integral Condition. NAMC [Internet]. 2004 Apr. 25 [cited 2025 Apr. 21];9(2):109-16. Available from: https://www.zurnalai.vu.lt/nonlinear-analysis/article/view/15159