TY  - JOUR
AU  - Tommy Bülow
TI  - Relative norms of units and 4-rank of class groups
JO  - Acta Arithmetica
PY  - 2005
SP  - 243
EP  - 264
VL  - 119
IS  - 3
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/articles/10.4064/aa119-3-2/
DO  - 10.4064/aa119-3-2
LA  - en
ID  - 10_4064_aa119_3_2
ER  -