@article{IM_1993__112_3_144103,
     author = {Angelo Vistoli},
     title = {The number of reducible hypersurfaces in a pencil.},
     journal = {Inventiones mathematicae},
     pages = {247--262},
     publisher = {mathdoc},
     volume = {112},
     number = {3},
     year = {1993},
     zbl = {0799.14024},
     url = {http://geodesic.mathdoc.fr/item/IM_1993__112_3_144103/}
}