%0 Journal Article %A Casas-Alvero, E. %T Singularities of polar curves %J Compositio Mathematica %D 1993 %P 339-359 %V 89 %N 3 %I Kluwer Academic Publishers %U http://www.numdam.org/item/CM_1993__89_3_339_0/ %G en %F CM_1993__89_3_339_0