@article{DE_1980_16_3_a15,
     author = {S. N. Samborskii},
     title = {The {Cauchy} problem for involutive systems of partial differential equations},
     journal = {Differencialʹnye uravneni\^a},
     pages = {516--521},
     publisher = {mathdoc},
     volume = {16},
     number = {3},
     year = {1980},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1980_16_3_a15/}
}