@article{1102945122, author = {Whittaker, James V.}, title = {On normal subgroups of differentiable homeomorphisms.}, journal = {Pacific J. Math.}, volume = {49}, number = {2}, year = {1973}, pages = { 595-613}, language = {en}, url = {http://dml.mathdoc.fr/item/1102945122} }
Whittaker, James V. On normal subgroups of differentiable homeomorphisms.. Pacific J. Math., Tome 49 (1973) no. 2, pp. 595-613. http://gdmltest.u-ga.fr/item/1102945122/