@misc{5706,
  author = {S. Poedts and H. A. Holties and J. P. Goedbloed},
  title = {HELENA : installation and user guide},
  year = {1996},
  number = {RR 96-228},
  month = {januari 1996},
  publisher = {FOM Rijnhuizen},
  address = {Nieuwegein, Netherlands},
  language = {eng},
}