1. Miljøets innflytelse på gastrointestinale parasitter hos purke;Alfredsen;Norsk Veterinærtidsskrift,1983
2. Early developmental stages of nematodes occurring in swine;Alicata;U.S. Department of Agriculture Technical Bulletin,1935
3. Bovine ostertagiasis: a review and annotated bibliography;Armour;Commonwealth Institute of Parasitology, Miscellaneous Publication,1982
4. Internal parasitism of feeder pigs in Southern Illinois;Biehl;Agri-Practice,1984
5. The development and survival of Trichuris suis ova on pasture plots in the south of England;Burden;Research in Veterinary Science,1979