%0 Journal Article %A Mandl, Petr %T Martingale methods in discrete state random processes %J Kybernetika %D 1982 %V 18 %N Suppl %I mathdoc %U http://geodesic.mathdoc.fr/item/KYB_1982__18_Suppl_a0/ %G en %F KYB_1982__18_Suppl_a0