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- Penning, W.E. (author), Weerts, A.H. (author) report 2006
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- Penning, W.E. (author), Haasnoot, M. (author), Kuijper, M.W.M. (author), Buren, R. van. (author) report 2006
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- Lee, G.E.M. van der (author), Penning, W.E. (author), Duel, H. (author), Boogaard, H.F.P. van den (author) report 2003
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- Lee, G.E.M. van der (author), Geilen, N. (author), Duel, H. (author), Penning, W.E. (author) report 2002
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Duel, H. (author), Baptist, M.J. (author), Penning, W.E. (author)A new strategy based on floodplain measures for both flood risk management and enhancement of the biodiversity of the river Rhine.report 2001
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- Penning, W.E. (author) report 2001
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Van der Kogel, H. (author), Penning, A. (author), Koerner, R.M. (author), Schenkeveld, F.M. (author)Dit rapport vat de resultaten samen van de meetrapporten "Acoustic Emission" (A.E.) gedrag van verschillende grondsoorten door ing. F.M. Schenkeveld, LGM en "Acoustic emission laboratory testing of sand, clay and peat soils" door Prof. R.M. Koerner, Drexel University, U.S.A. Het onderzoek werd verricht in opdracht van het Centrum voor Onderzoek...report 1982
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- Pereboom, D. (author), Penning, A. (author), Van den Burg, J.C. (author) report 1981
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- Van der Kogel, H. (author), Penning, A. (author), Koerner, R.M. (author) report 1981