1. Aalund, O., P. Willeberg, M. Mandrup & H. Riemann: Lung lesions at slaughter: Associations to factors in the pig herd. Nord. Vet.-Med. 1976, 28, 487–495.
2. Bäckstrøm, L. & H. Bremer: Sjukdomsregistringar på svin vid slaktbesiktning – ett hjälpme del i förebyggande svinhälsovård. (Disease registrations on pigs at slaughter as a method of preventive and therapeutic veterinary medicine in swine production). Svensk Vet.-Tidn. 1976, 28, 312–336.
3. Backstrøm, L. & H. Bremer: The relationship between disease incidences of fatteners registered at slaughter and environmental factors in herds. Nord. Vet.-Med. 1978, 30, 526–533.
4. Bäckstrøm, L. & K. Larsson: Slaktbesiktningsstatistik och miljöfaktorer i slaktsvinproduktionen (Abattoir inspection statistics and environmental factors in the bacon production). Svensk Vet.-Tidn. 1971, 23, 294–306.
5. Bryant, M. J. & R. Ewbank: Some effects of stocking rate and group size upon agonistic behaviour in groups of growing pigs. Brit. vet. J. 1972, 128, 64–70.