TY  - JOUR
AU  - Annalisa Baldi
AU  - Bruno Franchi
AU  - Maria Carla Tesi
TI  - Hypoellipticity, fundamental solution and Liouville type theorem for matrix-valued differential operators in Carnot groups
JO  - Journal of the European Mathematical Society
PY  - 2009
SP  - 777
EP  - 798
VL  - 11
IS  - 4
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/articles/10.4171/jems/166/
DO  - 10.4171/jems/166
ID  - JEMS_2009_11_4_a2
ER  -