TY  - JOUR
AU  - N. V. Zepelev
TI  - The shadow zone on the weak boundary of inhomogeneous mediums
JO  - Zapiski Nauchnykh Seminarov POMI
PY  - 1969
SP  - 187
EP  - 201
VL  - 15
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/ZNSL_1969_15_a12/
LA  - ru
ID  - ZNSL_1969_15_a12
ER  -