@article{DE_1973_9_12_a1,
     author = {V. I. Blagodatskikh},
     title = {The differentiability of solutions with respect to the initial conditions},
     journal = {Differencialʹnye uravneni\^a},
     pages = {2136--2140},
     publisher = {mathdoc},
     volume = {9},
     number = {12},
     year = {1973},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1973_9_12_a1/}
}