Delgado, Bolívar, et al. “Solitary Nodule of the Lung: Analysis of 100 Cases Submitted to Exploratory Thoracotomy and Anatomo-Pathological Control”. Cirugía Del Uruguay, vol. 42, no. 4, Feb. 1972, pp. 232-6, https://replica-revista.scu.org.uy/index.php/cir_urug/article/view/2230.