Affiliation: | 1.LSQM, DEMAT, UFRN, Av. Sen. Salgado Filho, 3000, Natal, RN, 59072-970, Brazil ;2.LIEC, DQ, UFSCar, Via Washington Luiz, km 235, São Carlos, SP, 13565-905, Brazil ;3.LabCQ, DEQ, UFRN, Av. Sen. Salgado Filho, 3000, Natal, RN, 59072-970, Brazil ; |