Cihan, Y. B., E. Kut, and A. Koç. “Recurrence of Retroperitoneal Localized Perivascular Epithelioid Cell Tumor Two Years After Initial Diagnosis: Case Report”. São Paulo Medical Journal, vol. 137, no. 2, Apr. 2019, pp. 206-8, https://periodicosapm.emnuvens.com.br/spmj/article/view/831.