@article{10_4153_CMB_1991_029_4,
     author = {Clark, David},
     title = {An {Arithmetical} {Function} {Associated} {With} the {Rank} of {Elliptic} {Curves}},
     journal = {Canadian mathematical bulletin},
     pages = {181--185},
     year = {1991},
     volume = {34},
     number = {2},
     doi = {10.4153/CMB-1991-029-4},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CMB-1991-029-4/}
}