Abhiram, I., S. Panchanathan, R. Ganesan, and A. Jenifer. “Serum Zinc Level: A Prognostic Marker for Severe Pneumonia in Children”. International Journal of Contemporary Pediatrics, vol. 6, no. 2, Feb. 2019, pp. 406-10, doi:10.18203/2349-3291.ijcp20190435.