TY  - JOUR
AU  - V. I. Bliznikas
TI  - The geometry of systems of first order partial differential equations
JO  - Itogi Nauki i Tekhniki. Seriya Problemy Geometrii. Trudy Geometricheskogo Seminara
PY  - 1969
SP  - 33
EP  - 53
VL  - 2
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/INTG_1969_2_a1/
LA  - ru
ID  - INTG_1969_2_a1
ER  -