[https://www.vetmed.vt.edu/news/tracks/pdf-version/TracksMagazine_FallWinter2015-web.pdfTRACKS. Magazine of theVirginia-Maryland College of Veterinary Medicine. Veterinary college researchers seek to reduce spread of economically devastating viruses,
develop animal models of human disease, and reduce antibiotic use in swine] (en anglès). Virginia-Maryland: Virginia-Maryland College of Veterinary Medicine, Tardor-Hivern 2015, p. 7.[Enllaç no actiu]