Khan, R., S. Siddique, F. Jabeen, A. U. Rehman, F. Javed, and J. H. Qamber. “Role of Chest X-Ray and Lung Ultrasound in Diagnosis and Treatment of Children and Infants With Pneumonia”. Pakistan Journal of Chest Medicine, vol. 27, no. 4, Dec. 2021, pp. 352-63, https://pjcm.net/index.php/pjcm/article/view/854.