Reference:
  Author: Quentin Geissmann
  Title: "OpenCFU, a New Free and Open-Source Software to Count Cell Colonies and Other Circular Objects"
  Journal: PLoS One
  Year: 2013
  Volume: 8
  Number: 2
  Pages: e54072
  DOI: 10.1371/journal.pone.0054072
  PMID: 23457446
  URL: http://www.plosone.org/article/info%3Adoi%2F10.1371%2Fjournal.pone.0054072
  eprint: http://www.plosone.org/article/fetchObject.action?uri=info%3Adoi%2F10.1371%2Fjournal.pone.0054072&representation=PDF
