%0 Journal Article %A Gerth, III, Frank %T Upper bounds for an Iwasawa invariant %J Compositio Mathematica %D 1979 %P 3-10 %V 39 %N 1 %I Sijthoff et Noordhoff International Publishers %U http://www.numdam.org/item/CM_1979__39_1_3_0/ %G en %F CM_1979__39_1_3_0