TY  - JOUR
AU  - V. M. Babich
TI  - On the asymptotics of Green's functions for certain wave problems. II. Nonstationary case
JO  - Sbornik. Mathematics
PY  - 1972
SP  - 45
EP  - 59
VL  - 16
IS  - 1
UR  - http://geodesic.mathdoc.fr/item/SM_1972_16_1_a3/
LA  - en
ID  - SM_1972_16_1_a3
ER  -