1. Birnstingl, M., Stone, B., Richards, V., 1956. Excretion of radioactive zinc (Zn-65) in bile, pancreatic and duodenal secretions of the dog. Am. J. Physiol., 186:377–379.
2. Cotzias, G.C., Borg, D.C., Selleck, B., 1962. Specificity of zinc pathway through the body: Turnover of 65-Zn in the mouse. Am. J. Physiol., 202:359–363.
3. Eeckhout, W., de Paepe, M., 1996. In Vitro and in Vivo Comparison of Microbial and Plant Phytase. In: Coelho, M.B., Kornegay, E.T.A. (Eds.), Phytase in Animal Nutrition and Waste Management. BASF Reference Manual, p.237–240.
4. Heubner, W., Stadler, H., 1914. On a titration method of determing phytate. Biochem. Z., 64:422–437 (in German).
5. Kernkamp, H.C.H., Ferrin, E.F., 1953. Parakeratosis in swine. J. Am. Vet. Med. Assoc., 123:217–220.