TY  - JOUR
AU  - Rupert L. Frank
TI  - On the scattering theory of the Laplacian with a periodic boundary condition. I. Existence of wave operators
JO  - Documenta mathematica
PY  - 2003
SP  - 547
EP  - 565
VL  - 8
UR  - http://geodesic.mathdoc.fr/articles/10.4171/dm/150/
DO  - 10.4171/dm/150
ID  - 10_4171_dm_150
ER  -