%0 Journal Article %A I. Kopocińska %A B. Kopociński %T Queueing systems with mixed input stream and feedback %J Applicationes Mathematicae %D 1974 %P 177-183 %V 14 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/am-14-2-177-183/ %R 10.4064/am-14-2-177-183 %G en %F 10_4064_am_14_2_177_183