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1by Nell, A.J., Ridwan, B.U., Sudarnika, E., Lukman, D.W., Wibowo, I., Ilyas, S., Basn, C., Sugama, A., Hermans, P.G.Article in monograph or in proceedings bibliotecaWUR NL
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2by Timmerman, H.M., Niers, L.E.M., Ridwan, B.U., Koning, C.J.M., Mulder, L., Akkermans, L.M.A., Rombouts, F.M., Rijkers, G.T.Article/Letter to editor bibliotecaWUR NL