1. Anonymous (2001a). Livestock, Meat and Eggs in The Netherlands. Product boards of Livestock, Meat and Eggs, Zoetermeer, The Netherlands
2. Anonymous (2001b). Quantitative Information Animal Husbandry 2001–2002 (KWIN). Research Institute for Animal Husbandry, Lelystad, The Netherlands (In Dutch)
3. Anonymous (2002a). Farmers Magazine. Available: http://www.zibb.nl (In Dutch)
4. Anonymous (2002b). Danske Slagterier, Copenhagen Denmark. Available: http://www.danskeslagterier.dk
5. Bagger, J., Nielsen, B. (2001). Salmonella reduction in chronic Salmonella infected Danish swineherds by use of a special task force. In: Van der Wolf, P. J., (Ed.), Proceedings of the 4th international symposium on the epidemiology and control of salmonella and other food borne pathogens in Pork. Leipzig, Germany