Free systems of vector fields (d'après L. Hörmander et A. Melin)
Séminaire Goulaouic-Schwartz (1977-1978), Talk no. 17, 7 p. 
@article{SEDP_1977-1978____A18_0,
     author = {Melin, A.},
     title = {Free systems of vector fields (d'apr\`es {L.} {H\"ormander} et {A.} {Melin)}},
     journal = {S\'eminaire Goulaouic-Schwartz},
     note = {talk:17},
     pages = {1--7},
     publisher = {Ecole Polytechnique, Centre de Math\'ematiques},
     year = {1977-1978},
     mrnumber = {504146},
     zbl = {0402.58009},
     language = {en},
     url = {https://www.numdam.org/item/SEDP_1977-1978____A18_0/}
}
TY  - JOUR
AU  - Melin, A.
TI  - Free systems of vector fields (d'après L. Hörmander et A. Melin)
JO  - Séminaire Goulaouic-Schwartz
N1  - talk:17
PY  - 1977-1978
SP  - 1
EP  - 7
PB  - Ecole Polytechnique, Centre de Mathématiques
UR  - https://www.numdam.org/item/SEDP_1977-1978____A18_0/
LA  - en
ID  - SEDP_1977-1978____A18_0
ER  - 
%0 Journal Article
%A Melin, A.
%T Free systems of vector fields (d'après L. Hörmander et A. Melin)
%J Séminaire Goulaouic-Schwartz
%Z talk:17
%D 1977-1978
%P 1-7
%I Ecole Polytechnique, Centre de Mathématiques
%U https://www.numdam.org/item/SEDP_1977-1978____A18_0/
%G en
%F SEDP_1977-1978____A18_0
Melin, A. Free systems of vector fields (d'après L. Hörmander et A. Melin). Séminaire Goulaouic-Schwartz (1977-1978), Talk no. 17, 7 p.. https://www.numdam.org/item/SEDP_1977-1978____A18_0/

[1] L. Hörmander and A. Melin: Free systems of vector fields. To appear in Arkiv for Matematik. | Zbl | MR

[2] L.P. Rothschild and E.M. Stein: Hypoelliptic differential operators and nilpotent groups. Acta Math. 137 (1976), 247-320. | Zbl | MR