Najeeb, S., S. Shah, B. Aalia, S. Sarwar, A. Khan, and E. Hussain. “Assessment of Children Presenting With History of Pica for Iron Deficiency Anaemia by Serum Ferritin Estimation”. Pakistan Journal of Physiology, Vol. 16, no. 2, June 2020, pp. 48-51, http://pjp.pps.org.pk/index.php/PJP/article/view/1182.