Stolf, N. A. G. “Christiaan Neethling Barnard — A Controversial Figure: Courage, Innovation, and the Global Impact of the world’s First Human Heart Transplant”. São Paulo Medical Journal, vol. 144, no. 2, May 2026, pp. 1-2, https://periodicosapm.emnuvens.com.br/spmj/article/view/3619.