MIDDLEMOST, S. Sad hearts in heart failure patients. SA Heart Journal, [S. l.], v. 5, n. 1, p. 28–33, 2017. DOI: 10.24170/5-1-2059. Disponível em: https://www.journals.ac.za/SAHJ/article/view/2059. Acesso em: 8 oct. 2025.