@article{CMH_1992__67_3_140254,
     author = {D. B\"attig},
     title = {A toroidal compactification of the {Fermi} surface for the discrete {Schr\"odinger} operator.},
     journal = {Commentarii mathematici Helvetici},
     pages = {1--16},
     publisher = {mathdoc},
     volume = {67},
     number = {3},
     year = {1992},
     zbl = {0812.58068},
     url = {http://geodesic.mathdoc.fr/item/CMH_1992__67_3_140254/}
}