TY  - JOUR
AU  - Masato Kikuchi
TI  - Improved ratio inequalities for martingales
JO  - Studia Mathematica
PY  - 1991
SP  - 109
EP  - 113
VL  - 99
IS  - 2
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/articles/10.4064/sm-99-2-109-113/
DO  - 10.4064/sm-99-2-109-113
LA  - en
ID  - 10_4064_sm_99_2_109_113
ER  -