@misc{39,
  author = {Wolfgang Aigner and Silvia Miksch and Bettina Thurnher and Stefan Biffl},
  title = {{PlanningLines Usability Studie - User Study zum Vergleich von PlanningLines und PERT Darstellung (in German)}},
  year = {2005},
  number = {Asgaard-TR-2005-3},
  language = {eng},
}