%0 Journal Article %A Sekiguchi, Tsutomu %A Suwa, Noriyuki %T On the structure of the group scheme $\mathbb {Z}[\mathbb {Z} / p^n]^\times $ %J Compositio Mathematica %D 1995 %P 253-271 %V 97 %N 1-2 %I Kluwer Academic Publishers %U http://www.numdam.org/item/CM_1995__97_1-2_253_0/ %G en %F CM_1995__97_1-2_253_0