TY  - JOUR
AU  - P. E. Krasnushkin
TI  - The properties of normal waves in periodic wave guides close to the multiplicity of the wave numbers
JO  - Doklady Akademii Nauk
PY  - 1973
SP  - 1053
EP  - 1056
VL  - 209
IS  - 5
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DAN_1973_209_5_a13/
LA  - ru
ID  - DAN_1973_209_5_a13
ER  -