@article{IM_1992__109_2_144027,
     author = {Armand Brumer and Ois{\'\i}n McGuinness},
     title = {The average rank of elliptic curves {I.} {With} {Appendix} },
     journal = {Inventiones mathematicae},
     pages = {445--472},
     publisher = {mathdoc},
     volume = {109},
     number = {2},
     year = {1992},
     zbl = {0783.14019},
     url = {http://geodesic.mathdoc.fr/item/IM_1992__109_2_144027/}
}