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1by Chalela,W.A., Kreling,J.C., Falcão,A.M., Hueb,W., Moffa,P.J., Pereyra,P.L.A., Ramires,J.A.F.
Published 2006Digital revistaSCIELO -
2by Duarte,D.A.M., Ribeiro,A.R., Vasconcelos,A.M.M., Silva,J.V.D., Andrade,P.L.A. de, Santana,A.A.P.
Published 2010Digital revistaSCIELO