1. Alten, E., Gevers, L. and Vormans, R. (1995). Swill, een lekker kostje? Agriculture High School, P.O. box 90108, 5200 MA ‘s-Hertogenbosch, The Netherlands, p. 71.
2. Ammerman, C.B. and Block, S.S. (1964). Feeding value of rations containing sewage sludge and sawdust. J. Agr. Food Chem., 12, 539.
3. Anon (1991). Sludge indicator. Slip wijzer. N.V.A. “Slibcommissie”, p. 48 On Dutch).
4. Anon (1992). Potentieel composteerbaar bedrijfsafval in Nederland. prom 92217-b.6–92, p. 47 (in Dutch).
5. Baird, D.M. and Young, C.T. (1973). Food waste makes high energy swine diet. Feedstuffs, 45, (11), 20–3.