@article{10_4171_dm_x7,
     author = {Niyaz Tokmagambetov and Berikbol T. Torebek},
     title = {Fractional analogue of {Sturm{\textendash}Liouville} operator},
     journal = {Documenta mathematica},
     pages = {1503--1514},
     year = {2016},
     volume = {21},
     doi = {10.4171/dm/x7},
     url = {http://geodesic.mathdoc.fr/articles/10.4171/dm/x7/}
}