@InCollection{	  Hertrampf97cc,
  title		= "The Shapes of Trees",
  year		= "1997",
  volume	= "1276",
  pages		= "412--421",
  publisher	= "Springer",
  address	= "Berlin",
  series	= "Lecture Notes in Computer Science",
  booktitle	= "Computing and combinatorics ({S}hanghai, 1997)",
  doi		= "10.1007/BFb0045108",
  author	= "Hertrampf, Ulrich"
}