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@article{MAN_1979__242_163273, author = {Herbert Leinfelder}, title = {A {Geometrie} {Proof} of the {Spectral} {Theorem} for {Unbounded} {Self-Adjoint} {Operators.}}, journal = {Mathematische Annalen}, pages = {85--96}, publisher = {mathdoc}, volume = {242}, year = {1979}, zbl = {0388.47011}, url = {http://geodesic.mathdoc.fr/item/MAN_1979__242_163273/} }
Herbert Leinfelder. A Geometrie Proof of the Spectral Theorem for Unbounded Self-Adjoint Operators.. Mathematische Annalen, Tome 242 (1979), pp. 85-96. http://geodesic.mathdoc.fr/item/MAN_1979__242_163273/