@article{Wiemer2001,
  title={A software package to analyze seismicity: ZMAP},
  author={Wiemer, Stefan},
  journal={Seismological Research Letters},
  volume={72},
  number={3},
  pages={373--382},
  year={2001},
  publisher={Seismological Society of America},
  doi = {10.1785/gssrl.72.3.373},
  URL = {http://srl.geoscienceworld.org/content/72/3/373.short}
}