%0 Journal Article
%A Masato Kikuchi
%T Improved ratio inequalities for martingales
%J Studia Mathematica
%D 1991
%P 109-113
%V 99
%N 2
%I mathdoc
%U http://geodesic.mathdoc.fr/articles/10.4064/sm-99-2-109-113/
%R 10.4064/sm-99-2-109-113
%G en
%F 10_4064_sm_99_2_109_113