@article{MZM_1973_13_3_a5,
     author = {B. V. Verbitskii},
     title = {A~boundary value problem for a~differential equation of second order},
     journal = {Matemati\v{c}eskie zametki},
     pages = {373--384},
     publisher = {mathdoc},
     volume = {13},
     number = {3},
     year = {1973},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1973_13_3_a5/}
}