Salman Ahmed, Muhammad Mohtasheemul Hasan, and Zafar Alam Mahmood. 2016. “In Vitro Microscopic Study of Calcium Hydrogen Phosphate Dihydrate Crystals Growth Patterns”. World Journal of Pharmaceutical Sciences 4 (1):64-67. https://wjpsonline.com/index.php/wjps/article/view/calcium-hydrogen-phosphate-crystals-growth-patterns.