Jahan, Khursheed, Maksuda Parvin, and Abdullah Ibn Mafiz. “Studies on Haemoglobin, Serum Calcium and Ascorbic Acid Level in Normal Pregnant, Pre-Eclamptic and Eclamptic Patients”. Bangladesh Journal of Nutrition 24 (March 3, 2013): 7–14. Accessed August 9, 2022. https://banglajol.info/index.php/BJNUT/article/view/14032.