%0 Journal Article %A Batho, Edward H. %T A note on a theorem of I.S. Cohen %J Portugaliae mathematica %D 1959 %P 187-192 %V 18 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/item/PORMA_1959__18_4_114824/ %G en %F PORMA_1959__18_4_114824