Calvelo, Agustín A., Eudoxio Vivas, Luis Falconi, and Dinorah Castiglioni. “Lumbar Hemangiopericytoma”. Cirugía del Uruguay 48, no. 2 (March 8, 1978): 143–146. Accessed May 28, 2026. https://replica-revista.scu.org.uy/index.php/cir_urug/article/view/2968.