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@article{CM_1993__85_2_229_0, author = {Howe, Everett W.}, title = {On the group orders of elliptic curves over finite fields}, journal = {Compositio Mathematica}, pages = {229--247}, publisher = {Kluwer Academic Publishers}, volume = {85}, number = {2}, year = {1993}, mrnumber = {1204781}, zbl = {0793.14023}, language = {en}, url = {http://geodesic.mathdoc.fr/item/CM_1993__85_2_229_0/} }
Howe, Everett W. On the group orders of elliptic curves over finite fields. Compositio Mathematica, Tome 85 (1993) no. 2, pp. 229-247. http://geodesic.mathdoc.fr/item/CM_1993__85_2_229_0/