E. J. Ouwerkerk

A mathematical model for estimating the amount and composition of slurry from fattening pigs

A. Aarnink, M. Verstegen, E. J. Ouwerkerk, 1992 .

The use of spraints to survey populations of otters Lutra lutra

J. Conroy, H. Kruuk, E. J. Ouwerkerk, 1986 .

Voluntary automatic milking in combination with grazing of dairy cows: Milking frequency and effects on behaviour

A. H. Ipema, M. Hendriks, J. Noordhuizen, 1999 .