Moni, Sabiha Yasmin, et al. “Role of Calcium Therapy on Urinary Calcium Creatinine Ratio in Healthy Pregnant Women and Pre-Eclamptic Women”. Bangladesh Journal of Physiology and Pharmacology, vol. 25, no. 1, Aug. 2010, pp. 7-9, doi:10.3329/bjpp.v25i1.5738.