APID - Hopp,P.; Webb,C.R.; Jarp,J. - Monte Carlo simulation of surveillance strategies for scrapie in Norwegian sheep - Preventive Veterinary Medicine 2003 Oct 15; 61(2): 103-25
AFNM - Hopp,P.; Ulvund,M.J.; Jarp,J. - A case-control study on scrapie in Norwegian sheep flocks - Preventive Veterinary Medicine 2001 Oct 11; 51(3-4): 183-98