TY  - JOUR
AU  - Robert L. Bryant
AU  - Lucas Hsu
TI  - Rigidity of integral curves of rank 2 distributions.
JO  - Inventiones mathematicae
PY  - 1993
SP  - 435
EP  - 462
VL  - 114
IS  - 1
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/IM_1993__114_1_144154/
ID  - IM_1993__114_1_144154
ER  -