@InProceedings{l98-p261-272,
  AUTHOR    = {Marisa Gutierrez and Joao Meidanis},
  TITLE     = {On the Clique Operator},
  YEAR      = 1998,
  BOOKTITLE = {Proc.~of the 3rd Latin American Symposium on Theoretical Informatics (LATIN'98)},
  ADDRESS   = {Campinas, Brazil},
  PAGES     = {261--272},
  KEYWORDS  = {}}