Pierre-Filho, Paulo de Tarso Ponte, Alessandra Maria Mont’Alverne Pierre, Maurício Abujamra Nascimento, and Ana Maria Marcondes. “Central Retinal Vein Prethrombosis As an Initial Manifestation of Protein S Deficiency”. São Paulo Medical Journal 122, no. 3 (May 5, 2004): 134–135. Accessed September 4, 2026. https://periodicosapm.emnuvens.com.br/spmj/article/view/2504.