UROOJ, A., P. SUMA, and R. KALRA. “IN VITRO BIO-ACCESSIBILITY OF CALCIUM FROM EGGSHELL POWDER AND CALCIUM SALTS”. Journal of Advances in Food Science & Technology, Vol. 5, no. 3, Sept. 2018, pp. 72-80, http://ikpress.org/index.php/JAFSAT/article/view/3765.