@article{DAN_1961_139_3_a6,
     author = {G. A. Kamenskii},
     title = {A two-point boundary-value problem for a non-linear second-order differential equation and mean-value theorems},
     journal = {Doklady Akademii Nauk},
     pages = {541--543},
     publisher = {mathdoc},
     volume = {139},
     number = {3},
     year = {1961},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1961_139_3_a6/}
}