1. School of Applied Mathematics, Getulio Vargas Foundation, Rio de Janeiro, Brazil, --- Select a Country ---
2. Institute of Mathematics and Statistics, University of São Paulo, Brazil, --- Select a Country ---
3. Computer Science Department, San Pablo Catholic University, Arequipa, Peru, --- Select a Country ---
4. Institute of Mathematics and Computer Sciences, São Carlos, Brazil, --- Select a Country ---
5. Computer Science and Engineering, New York University, New York, U.S.A., --- Select a Country ---