%0 Journal Article %A David C. Marshall %T Greenberg's conjecture and cyclotomic towers %J Acta Arithmetica %D 2004 %P 1-14 %V 113 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/aa113-1-1/ %R 10.4064/aa113-1-1 %G en %F 10_4064_aa113_1_1