(en) Knapen MHJ, Schurgers LJ, Vermeer C. Vitamin K2 supplementation improves hip bone geometry and bone strength indices in postmenopausal women. Osteoporos Int. 2007 Feb 8;18(7):963–72. PMID17287908. DOI:10.1007/s00198-007-0337-9. PMC1915640. Dit is een open access artikel.
(en) Knapen MHJ, Schurgers LJ, Vermeer C. Vitamin K2 supplementation improves hip bone geometry and bone strength indices in postmenopausal women. Osteoporos Int. 2007 Feb 8;18(7):963–72. PMID17287908. DOI:10.1007/s00198-007-0337-9. PMC1915640. Dit is een open access artikel.