@article{02151043, title = {Jet spaces as nonrigid Carnot groups.}, journal = {Journal of Lie Theory}, volume = {15}, year = {2005}, pages = {341-356}, zbl = {1079.53062}, language = {en}, url = {http://dml.mathdoc.fr/item/02151043} }
Warhurst, Ben. Jet spaces as nonrigid Carnot groups.. Journal of Lie Theory, Tome 15 (2005) pp. 341-356. http://gdmltest.u-ga.fr/item/02151043/