@article{CM_1993__89_3_339_0,
     author = {Casas-Alvero, E.},
     title = {Singularities of polar curves},
     journal = {Compositio Mathematica},
     pages = {339--359},
     publisher = {Kluwer Academic Publishers},
     volume = {89},
     number = {3},
     year = {1993},
     mrnumber = {1255701},
     zbl = {0806.14021},
     language = {en},
     url = {http://www.numdam.org/item/CM_1993__89_3_339_0/}
}