TY  - JOUR
AU  - V. A. Kondrat'ev
TI  - G.~Sansone and R.~Соnti, Non-linear differential equations (review)
JO  - Trudy Matematicheskogo Instituta imeni V.A. Steklova
PY  - 1967
VL  - 22
IS  - 6
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/RM_1967_22_6_a10/
LA  - ru
ID  - RM_1967_22_6_a10
ER  -