%0 Journal Article %A Ishimura, Naoyuki %A Mita, Yuji %T A note on the optimal portfolio problem in discrete processes %J Kybernetika %D 2009 %P 681-688 %V 45 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/item/KYB_2009__45_4_a11/ %G en %F KYB_2009__45_4_a11