@article{DE_1986_22_6_a27,
     author = {P. G. Lasy},
     title = {Uniqueness of the characteristic vectors of the solutions of a linear {Pfaffian} system},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1084--1086},
     publisher = {mathdoc},
     volume = {22},
     number = {6},
     year = {1986},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1986_22_6_a27/}
}