@inproceedings{PucherPucher2006,
  author    = {Karl Pucher and Robert Pucher},
  title     = {Pressure Losses Due to the Leakage in the Air Ducts – A safety Problem for Tunnel Users},
  booktitle = {VKM-THD Mitteilungen / 3rd Symposium, Tunnel Safety and Ventilation / Helmut Eichlseder / Heft 87 / 15.-17. Mai 2006 / S. 227 – 231},
  year      = {2006},
}