Turki, Kisma M, et al. “Evaluation of Serum Osteocalcin and Osteopontin Levels As Bone Biochemical Markers in Postmenopausal Women”. AL-Kindy College Medical Journal, vol. 9, no. 2, June 2013, pp. 40-44, https://jkmc.uobaghdad.edu.iq/index.php/MEDICAL/article/view/526.