@article{GDZPPN002091992,
title = {The Spectrum of Hill's Equation.},
journal = {Inventiones mathematicae},
volume = {29},
year = {1975},
pages = {217-274},
zbl = {0319.34024},
url = {http://dml.mathdoc.fr/item/GDZPPN002091992}
}
Moerbeke, P. van; McKean, H.P. The Spectrum of Hill's Equation.. Inventiones mathematicae, Tome 29 (1975) pp. 217-274. http://gdmltest.u-ga.fr/item/GDZPPN002091992/