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@article{MS2_1960__8_165742, author = {Arne Persson}, title = {Bounds for the {Discrete} {Part} of the {Spectrum} of a {Semi-Bounded} {Schr\"odinger} {Operator.}}, journal = {Mathematica Scandinavica}, pages = {143--153}, publisher = {mathdoc}, volume = {8}, year = {1960}, zbl = {0145.14901}, url = {http://geodesic.mathdoc.fr/item/MS2_1960__8_165742/} }
Arne Persson. Bounds for the Discrete Part of the Spectrum of a Semi-Bounded Schrödinger Operator.. Mathematica Scandinavica, Tome 8 (1960), pp. 143-153. http://geodesic.mathdoc.fr/item/MS2_1960__8_165742/