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@article{MAN_1982__261_182896, author = {Ryszard Grzaslewicz}, title = {Extreme {Contractions} on {Real} {Hilbert} {Spaces.}}, journal = {Mathematische Annalen}, pages = {463--466}, publisher = {mathdoc}, volume = {261}, year = {1982}, zbl = {0488.47018}, url = {http://geodesic.mathdoc.fr/item/MAN_1982__261_182896/} }
Ryszard Grzaslewicz. Extreme Contractions on Real Hilbert Spaces.. Mathematische Annalen, Tome 261 (1982), pp. 463-466. http://geodesic.mathdoc.fr/item/MAN_1982__261_182896/