TY - JOUR AU - È. I. Grudo TI - The stability of characteristic vectors of the solutions of linear homogeneous Pfaffian systems JO - Differencialʹnye uravneniâ PY - 1978 SP - 2136 EP - 2146 VL - 14 IS - 12 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/DE_1978_14_12_a3/ LA - ru ID - DE_1978_14_12_a3 ER -