Variations of the pulmonary valve. International Journal of Biomedical Research, [S. l.], v. 8, n. 2, p. 58–63, 2017. DOI: 10.7439/ijbr.v8i2.3861. Disponível em: https://ssjournals.co.in/index.php/ijbr/article/view/3861. Acesso em: 29 mar. 2026.