@article{02095717,
title = {On the scattering theory of the Laplacian with a periodic boundary condition. II. Additional channels of scattering.},
journal = {Documenta Mathematica},
volume = {9},
year = {2004},
pages = {57-77},
zbl = {1210.35040},
language = {en},
url = {http://dml.mathdoc.fr/item/02095717}
}
Frank, Rupert L.; Shterenberg, Roman G. On the scattering theory of the Laplacian with a periodic boundary condition. II. Additional channels of scattering.. Documenta Mathematica, Tome 9 (2004) pp. 57-77. http://gdmltest.u-ga.fr/item/02095717/