%0 Journal Article %A Luca Capogna %A Nicola Garofalo %T Regularity of minimizers of the calculus of variations in Carnot groups via hypoellipticity of systems of Hörmander type %J Journal of the European Mathematical Society %D 2003 %P 1-40 %V 5 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.1007/s100970200043/ %R 10.1007/s100970200043 %F JEMS_2003_5_1_a0