@article{GDZPPN002387735, title = {On Isometries and on a Theorem of Liouville.}, journal = {Mathematische Zeitschrift}, volume = {70}, year = {1958}, pages = {202-210}, zbl = {0097.38203}, url = {http://dml.mathdoc.fr/item/GDZPPN002387735} }
Hartman, Philip. On Isometries and on a Theorem of Liouville.. Mathematische Zeitschrift, Tome 70 (1958) pp. 202-210. http://gdmltest.u-ga.fr/item/GDZPPN002387735/