@article{DBLP:journals/eik/Pourbabai93a,
author = {Behnam Pourbabai},
title = {Approximating Departure Process of a Sigma G/M/1 Queueing
System with a Superposition Arrival Process},
journal = {Elektronische Informationsverarbeitung und Kybernetik},
volume = {29},
number = {3},
year = {1993},
pages = {179-191},
bibsource = {DBLP, http://dblp.uni-trier.de}
}