TY  - JOUR
AU  - F. I. Fedorov
TI  - An approximate general theory of elastic waves in crystals
JO  - Doklady Akademii Nauk
PY  - 1964
SP  - 792
EP  - 794
VL  - 155
IS  - 4
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DAN_1964_155_4_a18/
LA  - ru
ID  - DAN_1964_155_4_a18
ER  -