Ahasan, HAM Nazmul, and Aparna Das. “Vitamin D Deficiency in South Asian Populations: A Serious Emerging Problem”. Journal of Enam Medical College 3, no. 2 (August 7, 2013): 63–66. Accessed July 17, 2024. https://banglajol.info/index.php/JEMC/article/view/16125.