Singularities of polar curves
Compositio Mathematica, Volume 89 (1993) no. 3, p. 339-359
@article{CM_1993__89_3_339_0,
     author = {Casas-Alvero, Eduardo},
     title = {Singularities of polar curves},
     journal = {Compositio Mathematica},
     publisher = {Kluwer Academic Publishers},
     volume = {89},
     number = {3},
     year = {1993},
     pages = {339-359},
     zbl = {0806.14021},
     mrnumber = {1255701},
     language = {en},
     url = {http://www.numdam.org/item/CM_1993__89_3_339_0}
}
Casas-Alvero, E. Singularities of polar curves. Compositio Mathematica, Volume 89 (1993) no. 3, pp. 339-359. http://www.numdam.org/item/CM_1993__89_3_339_0/

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