L. Leme, M. Casanova, K. Breitman, and A. Furtado. Proc. of the 32nd Annual IEEE Software Engineering Workshop (SEW-32 2008), page 125--133. IEEE, (June 2009)
A. Fred, and A. Jain. ICPR '06: Proceedings of the 18th International Conference on Pattern Recognition, page 925--928. Washington, DC, USA, IEEE Computer Society, (2006)