%0 Journal Article %A J. Bartoszewicz %A T. Rolski %T Queueing systems with a reserve service channel %J Applicationes Mathematicae %D 1969 %P 439-449 %V 11 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/am-11-4-439-449/ %R 10.4064/am-11-4-439-449 %G en %F 10_4064_am_11_4_439_449