@article{DE_1984_20_10_a24,
     author = {Yu. K. Lando and A. L. Il'in},
     title = {Representation and solvability of a differential correspondence},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1821--1823},
     publisher = {mathdoc},
     volume = {20},
     number = {10},
     year = {1984},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1984_20_10_a24/}
}