@article{GDZPPN002411830,
title = {Absolute Continuity of the Essential Spectrum of - ... + q (t) without Monotony of q.},
journal = {Mathematische Zeitschrift},
volume = {129},
year = {1972},
pages = {83-94},
zbl = {0252.47043},
url = {http://dml.mathdoc.fr/item/GDZPPN002411830}
}
Walter, Johann. Absolute Continuity of the Essential Spectrum of - ... + q (t) without Monotony of q.. Mathematische Zeitschrift, Tome 129 (1972) pp. 83-94. http://gdmltest.u-ga.fr/item/GDZPPN002411830/