@article{DE_1969_5_10_a14,
     author = {A. I. Perov},
     title = {A certain generalization of the {Frobenius} theorem},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1881--1884},
     publisher = {mathdoc},
     volume = {5},
     number = {10},
     year = {1969},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1969_5_10_a14/}
}