@article{GDZPPN002203677,
title = {On the product formula in Galois groups.},
journal = {Journal f\"ur die reine und angewandte Mathematik},
volume = {372},
year = {1986},
pages = {172-183},
zbl = {0608.12011},
url = {http://dml.mathdoc.fr/item/GDZPPN002203677}
}
Wingberg, Kay. On the product formula in Galois groups.. Journal für die reine und angewandte Mathematik, Tome 372 (1986) pp. 172-183. http://gdmltest.u-ga.fr/item/GDZPPN002203677/