%0 Journal Article %A I. KopociƄska %T GI/M/1 queueing systems with service rates depending on the length of queue %J Applicationes Mathematicae %D 1969 %P 265-279 %V 11 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/am-11-3-265-279/ %R 10.4064/am-11-3-265-279 %G en %F 10_4064_am_11_3_265_279