@article{AIF_1995__45_2_577_0, author = {Franchi, Bruno and Lu, Guozhen and Wheeden, Richard L.}, title = {Representation formulas and weighted {Poincar\'e} inequalities for {H\"ormander} vector fields}, journal = {Annales de l'Institut Fourier}, pages = {577--604}, publisher = {Association des Annales de l{\textquoteright}institut Fourier}, volume = {45}, number = {2}, year = {1995}, doi = {10.5802/aif.1466}, mrnumber = {96i:46037}, zbl = {0820.46026}, language = {en}, url = {http://www.numdam.org/articles/10.5802/aif.1466/} }