1. Anon, 1962 History of hog cholera research in the US Department of Agriculture 1884–1960. Agriculture Information Bulletin No 241, Agriculture Research Service, US Department of Agriculture, Washington, DC, January 1962.
2. Bartak, P., Greiser-Wilke, I. Genetic typing of CSF virus isolates from the territory of the Czech Republic. Vet. Microbiol., in press.
3. Molecular characterization of the 3’ noncoding region of classical swine fever vaccine strains;Björklund;Virus Genes,1998
4. Björklund, H., Lowings, P., Paton, D., Stadejek, T., Vilcek. S., Greiser-Wilke, I., Belák, S., 1999 Phylogenetic comparison and molecular epidemiology of classical swine fever virus. Virus Genes, 19, 189–195.
5. A user’s guide to producing and interpreting tree diagrams in taxonomy and phylogenetics Part 2. The multiple alignment of DNA and protein sequences to determine their relationships;Clewley;Communicable Disease and Public Health,1999