TY - JOUR AU - Mustapha, Sami AU - Vigneron, François TI - Construction of Sobolev spaces of fractional order with sub-riemannian vector fields JO - Annales de l'Institut Fourier PY - 2007 DA - 2007/// SP - 1023 EP - 1049 VL - 57 IS - 4 PB - Association des Annales de l’institut Fourier UR - http://archive.numdam.org/articles/10.5802/aif.2285/ UR - https://www.ams.org/mathscinet-getitem?mr=2339325 UR - https://zbmath.org/?q=an%3A1143.46021 UR - https://doi.org/10.5802/aif.2285 DO - 10.5802/aif.2285 LA - en ID - AIF_2007__57_4_1023_0 ER -