| Http://: https://pmc.ncbi.nlm.nih.gov/articles/PMC3945082/ |
| Http://: http://www.cfsph.iastate.edu/FastFacts/pdfs/pseudocowpox_F.pdf |
| Http://: https://pmc.ncbi.nlm.nih.gov/articles/PMC3945082/ |
| Http://: http://www.cfsph.iastate.edu/FastFacts/pdfs/pseudocowpox_F.pdf |