@Article{	  WH94-1,
  author	= {Lars C. Wolf and Ralf Guido Herrtwich},
  title		= {{The System Architecture of the Heidelberg Transport
		  System}},
  year		= {1994},
  month		= apr,
  journal	= {ACM Operating System Review},
  url		= {http://www.kom.e-technik.tu-darmstadt.de/publications/abstracts/WH94-1.html}
		  
}