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

[A28]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 Annals of Operations Research Vol. 39, pp. 269-293, 1992.