Analysis and methodology of determining the norm of eigenfunctions as a limit transition in the scalar product in the spectral Stourm-Louvile problem for a photonic one-dimensional crystal. radiophysics [Internet]. 2023 Dec. 26 [cited 2026 Oct. 25];(39):18-26. Available from: https://periodicals.karazin.ua/radiophysics/article/view/24696