@article{DAN_1958_119_1_a0,
     author = {A. B. Vasil'eva},
     title = {On reiterated differentiation of solutions of simultaneous ordinary differential equations with a small parameter in the derivative term},
     journal = {Doklady Akademii Nauk},
     pages = {9--11},
     publisher = {mathdoc},
     volume = {119},
     number = {1},
     year = {1958},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1958_119_1_a0/}
}