Journal article (2002) - F.A.F. Fraga (author), L.M.S. Margato (author), S.T.G. Fetal (author), M.M.F.R. Fraga (author), R. Ferreira Marques (author), A.J.P.L. Policarpo (author), B. Guerard (author), A. Oed (author), G. Manzini (author), T.L. van Vuure (author)