TY  - JOUR
AU  - M. M. Lavrent'ev
TI  - On an inverse problem for the wave equation
JO  - Doklady Akademii Nauk
PY  - 1964
SP  - 520
EP  - 521
VL  - 157
IS  - 3
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DAN_1964_157_3_a5/
LA  - ru
ID  - DAN_1964_157_3_a5
ER  -