TY  - JOUR
AU  - Tsutomu Shimada
TI  - Index for subgroups of the group of units in number fields
JO  - Acta Arithmetica
PY  - 1998
SP  - 249
EP  - 263
VL  - 85
IS  - 3
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/articles/10.4064/aa-85-3-249-263/
DO  - 10.4064/aa-85-3-249-263
LA  - en
ID  - 10_4064_aa_85_3_249_263
ER  -