TY  - JOUR
AU  - Thomas Friedrich
TI  - A geometric estimate for a periodic Schrödinger operator
JO  - Colloquium Mathematicum
PY  - 2000
SP  - 209
EP  - 216
VL  - 83
IS  - 2
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/articles/10.4064/cm-83-2-209-216/
DO  - 10.4064/cm-83-2-209-216
LA  - en
ID  - 10_4064_cm_83_2_209_216
ER  -