@article{DAN_1957_113_6_a10,
     author = {Chan Chan Khun},
     title = {The existence and uniqueness of solutions of boundary problems for non-linear ordinary differential equations},
     journal = {Doklady Akademii Nauk},
     pages = {1227--1230},
     publisher = {mathdoc},
     volume = {113},
     number = {6},
     year = {1957},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1957_113_6_a10/}
}