TY  - JOUR
AU  - M. Sh. Birman
AU  - T. A. Suslina
TI  - Periodic differential operators of second order. Threshold properties and averagings
JO  - Algebra i analiz
PY  - 2003
SP  - 1
EP  - 108
VL  - 15
IS  - 5
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/AA_2003_15_5_a0/
LA  - ru
ID  - AA_2003_15_5_a0
ER  -