Kant, S., P. Haldar, A. Gupta, and A. Lohiya. “Serum Calcium Level Among Pregnant Women and Its Association With Pre-Eclampsia and Delivery Outcomes: A Cross-Sectional Study from North India”. Nepal Journal of Epidemiology, vol. 9, no. 4, Dec. 2019, pp. 795-03, doi:10.3126/nje.v9i4.23150.