@article{CM_1993__87_2_119_0,
     author = {Rohrlich, David E.},
     title = {Variation of the root number in families of elliptic curves},
     journal = {Compositio Mathematica},
     pages = {119--151},
     publisher = {Kluwer Academic Publishers},
     volume = {87},
     number = {2},
     year = {1993},
     mrnumber = {1219633},
     zbl = {0791.11026},
     language = {en},
     url = {http://www.numdam.org/item/CM_1993__87_2_119_0/}
}