@article{GDZPPN002100843,
title = {The 4-class ranks of quadratic fields related to the Weyl group algebra.},
journal = {Inventiones mathematicae},
volume = {75},
year = {1984},
pages = {489-516},
zbl = {0533.12004},
url = {http://dml.mathdoc.fr/item/GDZPPN002100843}
}
Gerth, Frank III. The 4-class ranks of quadratic fields related to the Weyl group algebra.. Inventiones mathematicae, Tome 75 (1984) pp. 489-516. http://gdmltest.u-ga.fr/item/GDZPPN002100843/