Authors: [[mailto:lfgs@inf.puc-rio.br|Luiz Fernando Gomes Soares]] and [[mailto:gflima@telemidia.puc-rio.br|Guilherme F. Lima]]\\
Published by the [[http://www.inf.puc-rio.br|Informatics Department]] - [[http://www.puc-rio.br|PUC-Rio]] -
no. 18/13 - ISSN: 0103-9741