TY  - JOUR
AU  - H. Knörrer
AU  - J. Feldman
AU  - E. Trubowitz
TI  - The pertubatively stable spectrum of a periodic Schrödinger operator.
JO  - Inventiones mathematicae
PY  - 1990
SP  - 259
EP  - 300
VL  - 100
IS  - 2
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/IM_1990__100_2_143785/
ID  - IM_1990__100_2_143785
ER  -