Bada, C., N. Y. Carreazo, J. P. Chalco, and L. Huicho. “Inter-Observer Agreement in Interpreting Chest X-Rays on Children With Acute Lower Respiratory Tract Infections and Concurrent Wheezing”. São Paulo Medical Journal, vol. 125, no. 3, May 2007, pp. 150-4, https://periodicosapm.emnuvens.com.br/spmj/article/view/2086.