@article{bwmeta1.element.bwnjournal-article-smv99i2p109bwm,
author = {Masato Kikuchi},
title = {Improved ratio inequalities for martingales},
journal = {Studia Mathematica},
volume = {100},
year = {1991},
pages = {109-113},
zbl = {0729.60040},
language = {en},
url = {http://dml.mathdoc.fr/item/bwmeta1.element.bwnjournal-article-smv99i2p109bwm}
}
Kikuchi, Masato. Improved ratio inequalities for martingales. Studia Mathematica, Tome 100 (1991) pp. 109-113. http://gdmltest.u-ga.fr/item/bwmeta1.element.bwnjournal-article-smv99i2p109bwm/