TY  - JOUR
AU  - S. G. Krein
AU  - Yu. B. Savchenko
TI  - Exponential dichotomy for partial differential equations
JO  - Differencialʹnye uravneniâ
PY  - 1972
SP  - 835
EP  - 844
VL  - 8
IS  - 5
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DE_1972_8_5_a12/
LA  - ru
ID  - DE_1972_8_5_a12
ER  -