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@article{CM_1982__46_3_307_0, author = {Kramer, K. and Tunnell, J.}, title = {Elliptic curves and local $\epsilon $-factors}, journal = {Compositio Mathematica}, pages = {307--352}, publisher = {Martinus Nijhoff Publishers}, volume = {46}, number = {3}, year = {1982}, zbl = {0496.14030}, language = {en}, url = {http://geodesic.mathdoc.fr/item/CM_1982__46_3_307_0/} }
Kramer, K.; Tunnell, J. Elliptic curves and local $\epsilon $-factors. Compositio Mathematica, Tome 46 (1982) no. 3, pp. 307-352. http://geodesic.mathdoc.fr/item/CM_1982__46_3_307_0/