Perturbation Analysis Algorithms for Estimating the Derivatives of Occupancy-Related Functions in Serial Queueing Networks

[C44]Wardi, Y., Kallmes, M.H., Cassandras, C.G., and  Gong, W-B.,
Perturbation Analysis Algorithms for Estimating the Derivatives of Occupancy-Related Functions in Serial Queueing Networks Proc. 30th IEEE Conf. Decision and Control , pp. 1523-1524, December   1991.