%0 Journal Article %A J. M. Jonnalagadda %A J. E. Nápoles Valdés %T Positive solutions of nabla fractional Sturm--Liouville problems %J The Bulletin of Irkutsk State University. Series Mathematics %D 2025 %P 50-65 %V 51 %I mathdoc %U http://geodesic.mathdoc.fr/item/IIGUM_2025_51_a3/ %G en %F IIGUM_2025_51_a3