%0 Journal Article %A Morvan, Jean-Marie %A Niglio, Louis %T Isotropic characteristic classes %J Compositio Mathematica %D 1994 %P 67-89 %V 91 %N 1 %I Kluwer Academic Publishers %U http://www.numdam.org/item/CM_1994__91_1_67_0/ %G en %F CM_1994__91_1_67_0