TY  - JOUR
AU  - V. M. Babich
TI  - The multidimensional WKB method or the ray method. Its analogues and generalizations
JO  - Itogi Nauki i Tekhniki. Seriya Sovremennye Problemy Matematiki. Fundamental'nye Napravleniya 
PY  - 1988
SP  - 93
EP  - 134
VL  - 34
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/INTF_1988_34_a2/
LA  - ru
ID  - INTF_1988_34_a2
ER  -