CHOŁUBEK, Gustaw; WIKTOR, Krzysztof; ROBAK-CHOŁUBEK, Dorota; PUTOWSKI, Lechosław; WIKTOR, Henryk. Ultrasound in Obstetrics – More Safe?. Polish Journal of Public Health, Lublin, Poland, v. 122, n. 1, p. 100–103, 2012. Disponível em: https://czasopisma.umlub.pl/pjph/article/view/1545. Acesso em: 6 jul. 2025.