@Article{	  h00sigact,
  title		= "Algebraic acceptance mechanisms for polynomial time
		  machines",
  journal	= "SIGACT News",
  year		= "2000",
  volume	= "31",
  number	= "2",
  pages		= "22--33",
  doi		= "10.1145/348210.348215",
  author	= "Hertrampf, Ulrich"
}