@article{AA_2016_28_1_a2,
     author = {Kh. K. Ishkin},
     title = {Localization criterion for the spectrum of the {Sturm{\textendash}Liouville} operator on a~curve},
     journal = {Algebra i analiz},
     pages = {52--88},
     year = {2016},
     volume = {28},
     number = {1},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/AA_2016_28_1_a2/}
}