Journal article (2003) - S.T.G. Fetal (author), C.W.E. van Eijk (author), CWE van Eijk (author), F.A.F. Fraga (author), J.T.M. de Haas (author), Johan de Haas (author), Rob Kreuger (author), R. Kreuger (author), R Kreuger (author), T.L. van Vuure (author), JM Schippers (author)

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.F. Ferreira (author), R. Ferreira (author), R.F. Ferreira Marques (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)