%0 Journal Article %A A. Szybiak %T Canonical form on a groupoid related to regular prolongations of Lie groups %J Colloquium Mathematicum %D 1972 %P 229-239 %V 26 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/cm-26-1-229-239/ %R 10.4064/cm-26-1-229-239 %G en %F 10_4064_cm_26_1_229_239