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@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://geodesic.mathdoc.fr/item/CM_1993__87_2_119_0/} }
Rohrlich, David E. Variation of the root number in families of elliptic curves. Compositio Mathematica, Tome 87 (1993) no. 2, pp. 119-151. http://geodesic.mathdoc.fr/item/CM_1993__87_2_119_0/