@article{DAN_1973_213_4_a10,
     author = {G. D. Stepanov},
     title = {An oscillation criterion for the {Green{\textquoteright}s} function of a two-point boundary value problem},
     journal = {Doklady Akademii Nauk},
     pages = {793--794},
     publisher = {mathdoc},
     volume = {213},
     number = {4},
     year = {1973},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1973_213_4_a10/}
}