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@article{MZ_1972__129_171822, author = {Johann Walter}, title = {Absolute {Continuity} of the {Essential} {Spectrum} of - ... + q (t) without {Monotony} of q.}, journal = {Mathematische Zeitschrift}, pages = {83--94}, publisher = {mathdoc}, volume = {129}, year = {1972}, zbl = {0252.47043}, url = {http://geodesic.mathdoc.fr/item/MZ_1972__129_171822/} }
Johann Walter. Absolute Continuity of the Essential Spectrum of - ... + q (t) without Monotony of q.. Mathematische Zeitschrift, Tome 129 (1972), pp. 83-94. http://geodesic.mathdoc.fr/item/MZ_1972__129_171822/