Filinovskiy, Alexey V. “On the Asymptotic Behavior of Eigenvalues and Eigenfunctions of the Robin Problem With Large Parameter”. Mathematical Modelling and Analysis 22, no. 1 (January 11, 2017): 37-51. Accessed April 20, 2024. https://journals.vilniustech.lt/index.php/MMA/article/view/872.