TY  - JOUR
AU  - V. V. Lychagin
TI  - Geometric theory of singularities of solutions of nonlinear differential equations
JO  - Itogi Nauki i Tekhniki. Seriya Problemy Geometrii. Trudy Geometricheskogo Seminara
PY  - 1988
SP  - 207
EP  - 247
VL  - 20
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/INTG_1988_20_a4/
LA  - ru
ID  - INTG_1988_20_a4
ER  -