TY  - JOUR
AU  - V. V. Zhikov
TI  - On gaps in the spectrum of some divergence elliptic operators with periodic coefficients
JO  - Algebra i analiz
PY  - 2004
SP  - 34
EP  - 58
VL  - 16
IS  - 5
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/AA_2004_16_5_a1/
LA  - ru
ID  - AA_2004_16_5_a1
ER  -