TY  - JOUR
AU  - M. M. Lavrent'ev
TI  - The maximum principle in the solutions of strongly elliptical second order systems
JO  - Doklady Akademii Nauk
PY  - 1957
SP  - 175
EP  - 176
VL  - 116
IS  - 2
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DAN_1957_116_2_a2/
LA  - ru
ID  - DAN_1957_116_2_a2
ER  -