Ultrasonоgraphic analysis of the fetal heart rhythm: clinical significance and differential diagnosis of bradyarrhythmias. Ukrainian Journal of Cardiology, [S. l.], v. 25, n. 4, p. 97–104, 2019. DOI: 10.31928/1608-635X-2018.4.97104. Disponível em: https://ucardioj.com.ua/index.php/UJC/article/view/35.. Acesso em: 24 jun. 2024.