1. Shils, M. E., Shike, M., Ross, A. C., Caballero, B. & Cousins, R. J. Modern Nutrition in Health and Disease 412–412 (Lippincott Williams & Wilkins, 2006).
2. Trumbo, P., Yates, A. A., Schlicker, S. & Poos, M. Dietary reference intakes: vitamin A, vitamin K, arsenic, boron, chromium, copper, iodine, iron, manganese, molybdenum, nickel, silicon, vanadium, and zinc. Journal of the American Dietetic Association 101, 294–301 (2001).
3. World Health Organization and Food and Agriculture Organization of the United Nations. Vitamin and Mineral Requirements in Human Nutrition 108–129 (World Health Organization and Food and Agriculture Organization of the United Nations, 2004).
4. University of Maryland Medical Center. Internet,
http://www.umm.edu/altmed/articles/vitamin-k-000343.htm#ixzz2RAHDe8ZR
accessed on November 2013 (2011).
5. Guelinckx, I., Devlieger, R. & Vansant, G. Reproductive outcome after bariatric surgery: a critical review. Human Reproduction Update 15, 189–201 (2009).