Reference:
  Author: J. F. Abril and R. Guigó and T. Wiehe
  Title: "gff2aplot: Plotting sequence comparisons"
  Journal: Bioinformatics
  Year: 2003
  Volume: 19
  Number: 18
  Pages: 2477-2479
  DOI: 10.1093/bioinformatics/btg334
  PMID: 4668236
  URL: http://bioinformatics.oxfordjournals.org/content/19/18/2477.abstract
  eprint: http://bioinformatics.oxfordjournals.org/content/19/18/2477.full.pdf+html
