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- Hengst, S. (author) other 1992
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- Glerum, E. (author), Hengst, S. (author) other 1991
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- van Oostveen, D.C. (author), Hengst, S. (author) master thesis 1990
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- Hengst, S. (author), Koele, J.W. (author), Stijnen, P. (author) other 1987
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- Hengst, S. (author), Vijn, J.F. (author), Saurwalt, K.J. (author) master thesis 1985
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- Doorduin, J.P. (author), Hengst, S. (author), Stijnen, P. (author) master thesis 1984
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- Kortenhorst, R.W.F. (author), Malotaux, P.Ch.A. (author), Hengst, S. (author) master thesis 1984