Journal article (2008) - M.J. Pelk (author), Marco J. Pelk (author), M Pelk (author), WCE Neo (author), JR Gajadharsing (author), RS Pengelly (author), Leonardus de Vreede (author), Leo De Vreede (author), Leo C.N. de Vreede (author), Leo C.N. De Vreede (author), L.C.N. de Vreede (author), LCN Vreede (author), LCN de Vreede (author), L.C.N. de Vreede (author), Leo C.N. Vreede (author), L.C.N. de De Vreede (author), L.C.N. de de Vreede (author), Leonardus Cornelis Nicolaas de Vreede (author), Leo de Vreede (author), Leo C. N. de Vreede (author), Leonardus Cornelis Nicolaas Vreede (author), LCN De Vreede (author), L.C.N. De Vreede (author), Leo C. N. De Vreede (author), Leonardus Vreede (author), Leonardus Cornelis Nicolaas De Vreede (author), Leonardus De Vreede (author), L.C.N. Vreede (author), Leo C. N. de De Vreede (author), Leo C. N. de Vreede (author), Leo C. N. de de Vreede (author), Leo C. N. Vreede (author), Leo Vreede (author)