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First Author:
 
Márcio P. Laurini
FEA-RP USP
mplaurini@gmail.com
 
Rua Antonio Spano 40, Vila Tibério
Ribeirão Preto, 14050-476, Brasil
 
551633290867(Phone)
551633290867(Fax)

Second Author:

Roberto B. Mauad
FEA-RP USP
robertomauad@gmail.com