TY - JOUR AU - Frank, Rupert L. 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 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/DOCMA_2003__8__a3/ LA - en ID - DOCMA_2003__8__a3 ER -