TY  - JOUR
AU  - Agrachev, A.
AU  - Marigo, A.
TI  - Nonholonomic tangent spaces: intrinsic construction and rigid dimensions
JO  - Electronic research announcements of the American Mathematical Society
PY  - 2003
SP  - 111
EP  - 120
VL  - 09
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/articles/10.1090/S1079-6762-03-00118-5/
DO  - 10.1090/S1079-6762-03-00118-5
ID  - ERAAMS_2003_09_a13
ER  -