@inproceedings{com2las99,
  author = {P.E. Lassila and J.T. Virtamo},
  title = {Efficient Importance Sampling for Monte Carlo Simulation of Loss Systems},
  booktitle = {{P}roceedings of ITC-16},
  address = {Edinburgh, England},
  month = {June},
  year = {1999},
  publisher = {Elsevier},
  pages = {787--796},
  url = {http://www.elsevier.com/},
}