Sobhy El-Sayed Ibrahim. On the General Ordinary Quasi-differential Operators with their\(L_{w}^{2}-\)Solutions and their Spectra. NRAMCS-V5 [Internet]. 2022 Jun. 28 [cited 2026 Jun. 4];:146-64. Available from: https://stm.bookpi.org/NRAMCS-V5/article/view/7489