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2. Institute of Medicine (IOM). Dietary Reference Intakes for Thiamin, Riboflavin, Niacin, Vitamin B b6 s, Folate, Vitamin B12, Pantothenic acid, Biotin, and Choline. National Academy Press: Washington, DC, 1998.
3. National Health and Medical Research Council (NHMRC). Nutrient Reference Values for Australia and New Zealand: Including Recommended Dietary Intakes. Commonwealth of Australia: Canberra, 2006.
4. Food and Agricultural Organization (FAO), World Health Organization (WHO) Human Vitamin and Mineral Requirements: Report of a joint FAO/WHO expert consultation. Available at: ftp://ftp.fao.org/docrep/fao/004/y2809e/y2809e00.pdf (2001, accessed 4 December 2013).
5. Health Council of the Netherlands. Towards an Optimal Use of Folic Acid. Gezondheidsraad: Den Haag, 2008.