@article{VMJ_2021_23_3_a1,
     author = {B. P. Allahverdiev and H. Tuna},
     title = {Titchmarsh--Weyl theory of the singular {Hahn--Sturm--Liouville} equation},
     journal = {Vladikavkazskij matemati\v{c}eskij \v{z}urnal},
     pages = {16--26},
     publisher = {mathdoc},
     volume = {23},
     number = {3},
     year = {2021},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/VMJ_2021_23_3_a1/}
}