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First Author:
 
Fernando H.P.S Mendes
Federal University of Rio Grande do Sul
fernandohpsm@hotmail.com
 
Av. João Pessoa, 52
Porto Alegre, 90040-000, Brazil
 
55 51 33083440(Phone)
55 51 33083440(Fax)

Second Author:

João Frois Caldeira
Federal University of Rio Grande do Sul
joao.caldeira@ufrgs.br
 
Porto Alegre, 90040-000, Brasil
 
55 51 33083440(Phone)
 

Third Author:

Guilherme Valle Moura
Federal University of Santa Catarina
guilherme.moura@ufsc.br
 
Universidade Federal de Santa Catarina
Florianópolis, 88040 970, Brazil
 
55 48 3721 9901(Phone)