@InProceedings{	  Reinhardt92imycs,
  author	= "Klaus Reinhardt",
  title		= "Counting and empty alternating pushdown automata",
  booktitle	= "Proc. 7th International Meeting of Young Computer
		  Scientists, Smolenice, Czechoslovakia, 16-20 November 1992
		  (IMYCS'92)",
  year		= "1995"
}