@article{GDZPPN002420988, title = {Prolongationally Stable Transformation Groups.}, journal = {Mathematische Zeitschrift}, volume = {162}, year = {1978}, pages = {189-194}, zbl = {0365.57017}, url = {http://dml.mathdoc.fr/item/GDZPPN002420988} }
Knight, Ronald A. Prolongationally Stable Transformation Groups.. Mathematische Zeitschrift, Tome 162 (1978) pp. 189-194. http://gdmltest.u-ga.fr/item/GDZPPN002420988/