@article{10_4171_dm_236,
     author = {William A. Stein},
     title = {Visibility of {Mordell-Weil} groups},
     journal = {Documenta mathematica},
     pages = {587--606},
     year = {2007},
     volume = {12},
     doi = {10.4171/dm/236},
     url = {http://geodesic.mathdoc.fr/articles/10.4171/dm/236/}
}