Štikonas, Artūras, and Erdoğan Şen. “Asymptotic Analysis of Sturm-Liouville Problem With Dirichlet and Nonlocal Two-Point Boundary Conditions”. Mathematical Modelling and Analysis 28, no. 2 (March 21, 2023): 308–329. Accessed March 29, 2024. https://journals.vilniustech.lt/index.php/MMA/article/view/17617.