1. Dietary intake and adequacy of vitamin K;Booth;J Nutr,1998
2. The role of menaquinones (vitamin K2) in human health;Beulens;Br J NutrFirstView Article:,2013
3. Comparison of menaquinone-4 and menaquinone-7 bioavailability in healthy women;Sato;Nutr J,2012
4. Dietary reference intakes for vitamin A, vitamin K, arsenic, boron, chromium, copper, iodine, iron, manganese, molybdenum, nickel, silicon, vanadium, and zinc;Food and Nutrition Board, Institute of Medicine,2001
5. Natural Standard. Vitamin K-Professional Monograph. Available at: http://www.naturalstandard.com/databases/vitamink. Accessed May 31, 2013.