Fackrell12'

@article{DBLP:journals/sigmetrics/Fackrell12,
  author    = {Mark Fackrell},
  title     = {Characterizing matrix-exponential distributions of order
               4 (abstract only)},
  journal   = {SIGMETRICS Performance Evaluation Review},
  volume    = {39},
  number    = {4},
  year      = {2012},
  pages     = {26},
  ee        = {http://doi.acm.org/10.1145/2185395.2185408},
  bibsource = {DBLP, http://dblp.uni-trier.de}
}