@article{INTG_1977_8_a2,
     author = {N. V. Stepanov},
     title = {The differential-geometric theory of the equation $y^n=f(x,y,y',\dots,y^{(n-1)})$},
     journal = {Itogi Nauki i Tekhniki. Seriya Problemy Geometrii. Trudy Geometricheskogo Seminara},
     pages = {47--66},
     publisher = {mathdoc},
     volume = {8},
     year = {1977},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/INTG_1977_8_a2/}
}