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@article{MZ_1979__169_172880, author = {Palle E.T. Jorgensen}, title = {Selfadjoint {Extension} {Operators} {Commuting} with an {Algebra.}}, journal = {Mathematische Zeitschrift}, pages = {41--62}, publisher = {mathdoc}, volume = {169}, year = {1979}, zbl = {0389.47014}, url = {http://geodesic.mathdoc.fr/item/MZ_1979__169_172880/} }
Palle E.T. Jorgensen. Selfadjoint Extension Operators Commuting with an Algebra.. Mathematische Zeitschrift, Tome 169 (1979), pp. 41-62. http://geodesic.mathdoc.fr/item/MZ_1979__169_172880/