C. S., R., R. Vanaki, A. V. Badakali, R. R. Pol, and Y. B. C. “Efficacy of Vitamin D Supplementation in the Treatment of Severe Pneumonia in Children Aged Less Than Five Years”. International Journal of Contemporary Pediatrics, vol. 3, no. 1, Dec. 2016, pp. 96-99, doi:10.18203/2349-3291.ijcp20160138.