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@article{MZ_1958__69_169735, author = {Philip Hartman}, title = {On {Isometries} and on a {Theorem} of {Liouville.}}, journal = {Mathematische Zeitschrift}, pages = {202--210}, publisher = {mathdoc}, volume = {69}, year = {1958}, zbl = {0097.38203}, url = {http://geodesic.mathdoc.fr/item/MZ_1958__69_169735/} }
Philip Hartman. On Isometries and on a Theorem of Liouville.. Mathematische Zeitschrift, Tome 69 (1958), pp. 202-210. http://geodesic.mathdoc.fr/item/MZ_1958__69_169735/