@article{GDZPPN002068192,
title = {A toroidal compactification of the Fermi surface for the discrete Schr\"odinger operator.},
journal = {Commentarii mathematici Helvetici},
volume = {67},
year = {1992},
pages = {1-16},
zbl = {0812.58068},
url = {http://dml.mathdoc.fr/item/GDZPPN002068192}
}
Bättig, D. A toroidal compactification of the Fermi surface for the discrete Schrödinger operator.. Commentarii mathematici Helvetici, Tome 67 (1992) pp. 1-16. http://gdmltest.u-ga.fr/item/GDZPPN002068192/