A clinical study of role of colour Doppler imaging in pregnancies at risk. International Journal of Biomedical Research, [S. l.], v. 4, n. 9, p. 477–480, 2013. DOI: 10.7439/ijbr.v4i9.336. Disponível em: https://ssjournals.co.in/index.php/ijbr/article/view/871. Acesso em: 11 mar. 2026.