1. US Department of Agriculture Animal and Plant Health Inspection Service Veterinary Services.
2. OIE World Organization for Animal Health Health Standards Chapter 2.3.3 Article 2.3.3.1 bovine tuberculosis 2003.
3. Leefers L. J.Ferris D.Propst.1997.Economic Consequences Associated with Bovine Tuberculosis in Northeastern Michigan Report to the State of Michigan Commission of Agriculture.
4. US Department of Agriculture Animal and Plant Health Inspection Service Veterinary Services.