“SHTURM-LIUVILL ОPЕRАTОRINING SPЕKTRАL NАZАRIYАSI VА DIFFЕRЕNSIАL TЕNGLАMАLАR UCHUN LОKАL SHАRTLI MАSАLАLАRNING О’ZIGА XОS YЕCHILISHI” (2026) Journal of Universal Science Research, 4(3), pp. 124–132. Available at: http://universalpublishings.com/index.php/jusr/article/view/17475 (Accessed: 18 May 2026).