%0 Journal Article %A Bruno Franchi %A Richard Wheeden %T Compensation couples and isoperimetric estimates for vector fields %J Colloquium Mathematicum %D 1997 %P 9-27 %V 74 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/cm-74-1-9-27/ %R 10.4064/cm-74-1-9-27 %G en %F 10_4064_cm_74_1_9_27