@article{ZVMMF_1964_4_5_a1,
     author = {E. P. Zhidkov and V. P. Shirikov},
     title = {Boundary value problem for ordinary second order differential equations},
     journal = {\v{Z}urnal vy\v{c}islitelʹnoj matematiki i matemati\v{c}eskoj fiziki},
     pages = {804--816},
     publisher = {mathdoc},
     volume = {4},
     number = {5},
     year = {1964},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZVMMF_1964_4_5_a1/}
}