Agrawal, B. K., V. Jain, and A. Varshney. “Bone Turnover Markers in Women Can Predict Low Bone Mineral Density”. International Journal of Research in Medical Sciences, vol. 3, no. 4, Jan. 2017, pp. 876-9, https://www.msjonline.org/index.php/ijrms/article/view/1398.