On the structure of the group scheme $\mathbb{Z}{[\mathbb{Z}/p^n]}^{\times }$

Sekiguchi, Tsutomu; Suwa, Noriyuki

Compositio Mathematica, Volume 97 (1995) p. 253-271

Théorie de Kummer-Artin-Schreier et applications

Suwa, Noriyuki; Sekiguchi, Tsutomu

Journal de théorie des nombres de Bordeaux, Volume 7 (1995) p. 177-189

Wild ramification of moduli spaces for curves or for abelian varieties

Sekiguchi, Tsutomu

Compositio Mathematica, Volume 54 (1985) p. 331-372