@InProceedings{	  adhp2000,
  author	= "Holger Austinat and Volker Diekert and Ulrich Hertrampf
		  and Holger Petersen",
  booktitle	= "Proc. RIMS Symposium on Algebraic Systems, Formal
		  Languages and Computation, Kyoto, Japan",
  title		= "On Regular Frequency Computations",
  year		= "2000",
  pages		= "35--42"
}