%0 Journal Article %A Wiojciech Wajda %T Limit theorems for nonhomogeneous semi-Markov processes %J Applicationes Mathematicae %D 1991 %P 1-14 %V 21 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/am-21-1-1-14/ %R 10.4064/am-21-1-1-14 %G en %F 10_4064_am_21_1_1_14