@inproceedings{PucherPucher2007,
  author    = {Karl Pucher and Robert Pucher},
  title     = {Long concrete air ducts in road tunnels should be airtight – are they really?},
  booktitle = {Proceedings of the FIB Symposium Dubrovnik Concrete Structures - Stimulators of Development / 20 to 23 May 2007 / Dubrovnik (Croatia) / SECON HDGK Zagreb / 2007 / ISBN 978-953-95428-4-7/ S. 677 – 684},
  year      = {2007},
}