A case–control study on scrapie in Norwegian sheep flocksPetter Hopp, Jorun Jarp, Martha J. Ulvund|Preventive Veterinary Medicine|2001Cited by 40
An evaluation of the Norwegian Salmonella surveillance and control program in live pig and porkMarianne Sandberg, Eystein Skjerve, Petter Hopp et al.|International Journal of Food Microbiology|2002Cited by 25
Norwegian farmers' vigilance in reporting sheep showing scrapie-associated signsPetter Hopp, Jorun Jarp, Synnøve Vatn|BMC Veterinary Research|2007Cited by 25
Monte Carlo simulation of surveillance strategies for scrapie in Norwegian sheepPetter Hopp, Jorun Jarp, Cerian Ruth Webb|Preventive Veterinary Medicine|2003Cited by 24