%0 Journal Article %A Ryszard Magiera %T ${\mit \Gamma }$-minimax sequential estimation for Markov-additive processes %J Applicationes Mathematicae %D 2001 %P 467-485 %V 28 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/am28-4-7/ %R 10.4064/am28-4-7 %G en %F 10_4064_am28_4_7