@Article{	  LohreyP05ita,
  author	= "Markus Lohrey and Holger Petersen",
  title		= "Complexity Results for Prefix Grammars",
  journal	= "RAIRO. Informatique Th{\'e}orique et Applications",
  volume	= "39",
  number	= "3",
  pages		= "391--401",
  year		= "2005",
  doi		= "10.1051/ita:2005024"
}