@article{DBLP:journals/sigmetrics/CasaleHV12,
  author    = {Giuliano Casale and Peter G. Harrison and Maria Grazia Vigliotti},
  title     = {Product-form approximation of queueing networks with phase-type service},
  journal   = {SIGMETRICS Perform. Evaluation Rev.},
  volume    = {39},
  number    = {4},
  pages     = {36},
  year      = {2012},
  doi       = {10.1145/2185395.2185427}
}