1. Some effects of level of feeding and body condition upon sperm production and gonadotropin concentrations in the ram;Alkass;Anim. Prod.,1982
2. Veevoedertabel. Gegevens over Voederwaarde;CBV (Centraal Veevoederbureau in Nederland),1988
3. Voeding en houderij van beren in de praktijk;Kemp,1986
4. Effect of environmental temperature on metabolic rate of A.I. boars;Kemp,1988
5. The effect of mating frequency on energy requirement of A.I. boars;Kemp,1988