Kulkarni, S. P., and A. A. Chougule. “Correlation of Serum Vitamin D Levels and Anemia in Childhood Pneumonia: A Case Control Study from Rural Area”. International Journal of Contemporary Pediatrics, vol. 4, no. 3, Apr. 2017, pp. 756-61, doi:10.18203/2349-3291.ijcp20171075.