APFG - Berevka,S.V. - [Prions and protein inhibitors of proteinases: structural analogies and their consequences. IV. The nature of the interspecies barrier of prion disease] - Priony i belkovye ingibitory proteinaz: strukturnye analogii i ikh sledstviia. IV. O prirode mezhvidovogo bar'era prionovykh zabolevanii. - Ukrainskii Biokhimicheskii Zhurnal 2003 Jan-Feb; 75(1): 115-20