%0 Journal Article %A Niyaz Tokmagambetov %A Berikbol T. Torebek %T Fractional analogue of Sturm–Liouville operator %J Documenta mathematica %D 2016 %P 1503-1514 %V 21 %U http://geodesic.mathdoc.fr/articles/10.4171/dm/x7/ %R 10.4171/dm/x7 %F 10_4171_dm_x7