@TechReport{	  SW97-3,
  author	= {Jens Schmitt and Lars Wolf},
  title		= {{Quality of Service - An Overview}},
  year		= 1997,
  month		= apr,
  journal	= {},
  volume	= {},
  number	= {TR-KOM-1997-01},
  booktitle	= {},
  publisher	= {},
  institution	= {Darmstadt University of Technology},
  howpublished	= {},
  note		= {},
  url		= {ftp://ftp.kom.e-technik.tu-darmstadt.de/pub/papers/SW97-3.pdf}
  %url		= {http://www.kom.e-technik.tu-darmstadt.de/publications/abstracts/SW97-3.html}

}