@article{GDZPPN00206426X,
title = {An example of a Schroedinger equation with almost periodic potential and nowhere dense spectrum.},
journal = {Commentarii mathematici Helvetici},
volume = {56},
year = {1981},
pages = {198-224},
zbl = {0477.34018},
url = {http://dml.mathdoc.fr/item/GDZPPN00206426X}
}
Moser, Jürgen. An example of a Schroedinger equation with almost periodic potential and nowhere dense spectrum.. Commentarii mathematici Helvetici, Tome 56 (1981) pp. 198-224. http://gdmltest.u-ga.fr/item/GDZPPN00206426X/