%0 Journal Article %A Yoko Inoue %A Kaori Ota %T Indices of subfields of cyclotomic ${\mathbb Z}_p$-extensions and higher degree Fermat quotients %J Acta Arithmetica %D 2015 %P 101-114 %V 169 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/aa169-2-1/ %R 10.4064/aa169-2-1 %G en %F 10_4064_aa169_2_1