Sobhy El-Sayed IBRAHIM. On the General Ordinary Quasi-differential Operators with their\(L_{w}^{2}-\)Solutions and their Spectra. Novel Research Aspects in Mathematical and Computer Science Vol. 5, [S. l.], p. 146–164, 2022. DOI: 10.9734/bpi/nramcs/v5/3464B. Disponível em: https://stm.bookpi.org/NRAMCS-V5/article/view/7489. Acesso em: 4 jun. 2026.