Erlon De Avila Carvalho, et al. “Pericardial Effusion Caused by Renal Carcinoma of Clear Metastatic Cells: A Rare Cause of Cardiac Tamponade”. Global Journal of Medical Research, vol. 20, no. F8, July 2020, pp. 25-29, https://medicalresearchjournal.org/index.php/GJMR/article/view/2190.