@InProceedings{l04-p339-348,
  AUTHOR    = {Saverio Caminiti and Irene Finocchi and Rossella Petreschi},
  TITLE     = {A unified approach to coding labeled trees},
  YEAR      = 2004,
  ADDRESS   = {Buenos Aires, Argentina},
  BOOKTITLE = {Proc.~of the 6th Latin American Symposium on Theoretical Informatics (LATIN'04)},
  PAGES     = {339--348},
  KEYWORDS  = {}}