%0 Journal Article %A Timothy Nguyen %T A lower bound on the radius of analyticity of a power series in a real Banach space %J Studia Mathematica %D 2009 %P 171-179 %V 191 %N 2 %U http://geodesic.mathdoc.fr/articles/10.4064/sm191-2-5/ %R 10.4064/sm191-2-5 %G en %F 10_4064_sm191_2_5