@article{DE_1971_7_9_a3,
     author = {A. N. Vityuk},
     title = {A generalized {Cauchy} problem for a system of differential equations not solved with respect to the derivatives},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1575--1580},
     publisher = {mathdoc},
     volume = {7},
     number = {9},
     year = {1971},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1971_7_9_a3/}
}