Artificial Intelligence, Hallucinated Citations,and the Risk of Self-Validating Knowledge. Portuguese Kidney Journal, [S. l.], v. 40, n. 2, p. 66–68, 2026. DOI: 10.71749/pkj.155. Disponível em: https://pkj.spnefro.pt/index.php/journal/article/view/155.. Acesso em: 27 jun. 2026.