@Article{	  AllenderH94ic,
  title		= "Depth Reduction for Circuits of Unbounded Fan-In",
  journal	= "Information and Computation",
  year		= "1994",
  volume	= "112",
  number	= "2",
  pages		= "217--238",
  issn		= "0890-5401",
  doi		= "10.1006/inco.1994.1057",
  author	= "Allender, Eric and Hertrampf, Ulrich"
}