Ketki Khandhadiya, Mrinal Gupta, Shailesh Kumar, and Pragna Rao. “Role of Serum Copper in Dysfunctional Uterine Bleeding (DUB)”. International Journal of Health and Clinical Research, vol. 4, no. 15, Aug. 2021, pp. 313-5, https://ijhcr.com/index.php/ijhcr/article/view/2521.