@article{02146804,
title = {Additive structure of multiplicative subgroups of fields and Galois theory.},
journal = {Documenta Mathematica},
volume = {9},
year = {2004},
pages = {301-355},
zbl = {1073.11025},
language = {en},
url = {http://dml.mathdoc.fr/item/02146804}
}
Mahé, Louis; Mináč, Ján; Smith, Tara L. Additive structure of multiplicative subgroups of fields and Galois theory.. Documenta Mathematica, Tome 9 (2004) pp. 301-355. http://gdmltest.u-ga.fr/item/02146804/