TY  - JOUR
AU  - L. I. Kamynin
AU  - B. N. Khimchenko
TI  - On a priori boundary estimates for the solutions of second order equations with nonnegative characteristic form
JO  - Doklady Akademii Nauk
PY  - 1977
SP  - 16
EP  - 19
VL  - 232
IS  - 1
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DAN_1977_232_1_a2/
LA  - ru
ID  - DAN_1977_232_1_a2
ER  -