@InProceedings{MPV04-trees,
  author     = "Luciano Margara and Alessandro Pistocchi and Marco Vassura",
  title      = {Perfect Token Distribution on Trees},
  booktitle  = "Proceedings of 11th Colloquium on Structural Information and Communication Complexity (SIROCCO 2004)",
  address    = "Smolenice Castle, Slovakia",
  month      = jun,
  year       = 2004,
	number     = 3104,
  series     = "Lecture Notes in Computer Science",
  publisher  = "Springer-Verlag",
  keywords   = "bison",
  pdfurl     = "http://www.cs.unibo.it/bison/publications/sirocco04.pdf"
}