@article{05379352,
title = {Differentiability of mappings in the geometry of Carnot manifolds.},
journal = {Sibirskij Matematicheskij Zhurnal},
volume = {48},
year = {2007},
pages = {251-271},
zbl = {1164.53345},
language = {en},
url = {http://dml.mathdoc.fr/item/05379352}
}
Vodop'yanov, S.K. Differentiability of mappings in the geometry of Carnot manifolds.. Sibirskij Matematicheskij Zhurnal, Tome 48 (2007) pp. 251-271. http://gdmltest.u-ga.fr/item/05379352/