Stanley B. Prusiner, Michael Scott, Dallas Foster, Keh-Ming Pan, Darlene Groth, Carol Mirenda, Marilyn Torchia, Shu-Lian Yang, Dan Serban, George A. Carlson, Peter C. Hoppe, David Westaway, Stephen J. DeArmond,
Transgenetic studies implicate interactions between homologous PrP isoforms in scrapie prion replication. Cell. ,vol. 63, pp. 673- 686 ,(1990) ,
10.1016/0092-8674(90)90134-Z