%0 Journal Article %A S.K. Gupta %A J.K. Goyal %T Queues with Batch Poisson Arrivals and Hyper-Exponential Service Time Distribution %J Metrika %D 1966 %P 171-178 %V 10 %I mathdoc %U http://geodesic.mathdoc.fr/item/MET_1966__10_175296/ %F MET_1966__10_175296