1. AOAC. 1990. Official Methods of Analysis of the Association of Official Analytical Chemists, 15th ed. Helrich, K. (ed.) (Arlington, VA, Association of Official Analytical Chemists).
2. Bessey, O.A., Lowry, O.H., and Brock, M.J., 1946. 21. Guy, WS, DR Taves and WS Brey Jr, 1976. A method for the rapid determination of alkaline Organic fluoro-compounds in human plasma phosphatase with five cubic millimetres of serum. Prevalence and characterisation. Journal Biological Chemistry, 164, 321-329
3. Brand, T.S., Cloete, S.W.P., 2007. Achievements of research in the field of ostrich production. Animal production and animal science worldwide. World Association for Animal Production, Waginingen Academic, Italy, pp 18–194.
4. Brand, T.S., Gous, R.M., 2006. Feeding Ostriches. In: Feeding in Domestic Vertebrates: From Structure to Behaviour. Ed. Bels, V., CAB International, Wallingford, England. pp. 136-155
5. Brand, T., Olivier, A., 2011. Ostrich Nutrition and Welfare. In: P.C. Glatz, C. Lunam and I. Malecki (eds), The Welfare of farmed ratites, (Berlin, Heidelberg, Germany: Springer-Verlag), 91–109