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@article{MAN_1981__255_182825, author = {W.D. Evans}, title = {On the {Spectra} of {Schr\"odinger} {Operators} with a {Complex} {Potential.}}, journal = {Mathematische Annalen}, pages = {57--76}, publisher = {mathdoc}, volume = {255}, year = {1981}, zbl = {0438.35025}, url = {http://geodesic.mathdoc.fr/item/MAN_1981__255_182825/} }
W.D. Evans. On the Spectra of Schrödinger Operators with a Complex Potential.. Mathematische Annalen, Tome 255 (1981), pp. 57-76. http://geodesic.mathdoc.fr/item/MAN_1981__255_182825/