http://communications.elsevier.com/nl/jsp/m.jsp?c=%40O9bG3CFdrhhV3lwBvSTRTmhsOS0dfrvmzFSHjuW2D80%3D C -- Carlos Alberto de Bragança Pereira http://www.ime.usp.br/~cpereira http://scholar.google.com.br/citations?user=PXX2AygAAAAJ&hl=pt-BR Stat Department - Professor & Head University of São Paulo