@Article{	  KSWS98-2,
  author	= {Martin Karsten and Jens Schmitt and Lars Wolf and Ralf
		  Steinmetz},
  title		= {{Abrechnungsverfahren f{\"u}r paketvermittelte
		  diensteintegrierende Kommunikationsnetze}},
  year		= {1998},
  month		= dec,
  journal	= {Praxis in der Informationsverarbeitung und Kommunikation
		  (PIK)},
  volume	= {21},
  number	= {4},
  booktitle	= {},
  publisher	= {},
  institution	= {},
  howpublished	= {},
  pages		= {},
  note		= {in German},
  url		= {http://www.kom.e-technik.tu-darmstadt.de/publications/abstracts/KSWS98-2.html}
		  
}