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First Author:
 
Paulo Matos
CAEN/UFC
paulomatos@caen.ufc.br
 
DR JOSE LOURENCO, 1550
FORTALEZA, 60115-281
 
85985612187(Phone)
85985612187(Fax)

Second Author:

Valdeir Monteiro
CAEN/UFC
valdeir.smonteiro@alu.ufc.br