Paper  bibtex   

@article{ geosystems_erdas_2004,
  title = {{ERDAS} imagine},
  url = {http://dca.ufcg.edu.br/DCA_download/ISR/UFPE/CD1/Win_ConfigGuide.pdf},
  urldate = {2014-07-08TZ},
  journal = {Atlanta, Georgia},
  author = {Geosystems, Leica},
  year = {2004},
  keywords = {erdas, overview}
}