TY - JOUR AU - J. M. Jonnalagadda AU - J. E. Nápoles Valdés TI - Positive solutions of nabla fractional Sturm--Liouville problems JO - The Bulletin of Irkutsk State University. Series Mathematics PY - 2025 SP - 50 EP - 65 VL - 51 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/IIGUM_2025_51_a3/ LA - en ID - IIGUM_2025_51_a3 ER -