D. V. Kanagal, A. Rajesh, K. Rao, H. Shetty, P. K. Shetty, and H. Ullal, “Zinc and copper levels in preeclampsia: a study from coastal South India”, Int J Reprod Contracept Obstet Gynecol, vol. 3, no. 2, pp. 370–373, Jan. 2017.