@article{GDZPPN002335905,
title = {On the structure of Selmer groups.},
journal = {Mathematische Annalen},
volume = {291},
year = {1991},
pages = {253-260},
url = {http://dml.mathdoc.fr/item/GDZPPN002335905}
}
Koyvagin, V.A. On the structure of Selmer groups.. Mathematische Annalen, Tome 291 (1991) pp. 253-260. http://gdmltest.u-ga.fr/item/GDZPPN002335905/