@article{JRAM_1990__412_153279,
     author = {Henri Darmon and Massimo Bertolini},
     title = {Kolyvagin's descent and {Mordell-Weil} groups over ring class fields.},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {63--74},
     publisher = {mathdoc},
     volume = {412},
     year = {1990},
     zbl = {0712.14008},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1990__412_153279/}
}