1. ANGN. 1991b.Halofuginone: determinative method, in Analytical Chemistry Laboratory Guidebook Residue Chemistry, HLF-1–HLF-20. Washington, DC, USA: USDA, FSIS, Science and Technology Program.
2. ANGN. 1995.Animals: chemical inputs for nutrition and health - overview, in Chemical Economics Handbook, Edited by: M. , WENZEU A. 201.8002 SMenlo Park, CA, USA: SRI International.