Mortensen, B. M.; Gautvik, K. M.; Gordeladze, J. O. (1993). „Bone turnover in rats treated with 1,25-dihydroxyvitamin D3, 25-hydroxyvitamin D3 or 24,25-dihydroxyvitamin D3”. Bioscience reports 13 (1): 27–39. PMID 8392394.
