@article{ZVMMF_2009_49_9_a7,
     author = {A. A. Vladimirov},
     title = {On the oscillation theory of the {Sturm{\textendash}Liouville} problem with singular coefficients},
     journal = {\v{Z}urnal vy\v{c}islitelʹnoj matematiki i matemati\v{c}eskoj fiziki},
     pages = {1609--1621},
     publisher = {mathdoc},
     volume = {49},
     number = {9},
     year = {2009},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZVMMF_2009_49_9_a7/}
}