@article{FAA_2010_44_4_a1,
     author = {R. S. Ismagilov and A. G. Kostyuchenko},
     title = {Spectral {Asymptotics} for the {Sturm--Liouville} {Operator} with {Point} {Interaction}},
     journal = {Funkcionalʹnyj analiz i ego prilo\v{z}eni\^a},
     pages = {14--20},
     publisher = {mathdoc},
     volume = {44},
     number = {4},
     year = {2010},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/FAA_2010_44_4_a1/}
}