%0 Journal Article %A D. CzerwiƄska %T Queueing systems with priorities. %J Mathematica Applicanda %D 1976 %P 5-69 %V 4 %N 7 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.14708/ma.v4i7.1197/ %R 10.14708/ma.v4i7.1197 %G pl %F 10_14708_ma_v4i7_1197