LONI, S. B. A. R. Valsalva ratio: a measure of stress in first year medical students. International Journal of Research in Medical Sciences, [S. l.], v. 3, n. 7, p. 1599–1604, 2017. DOI: 10.18203/2320-6012.ijrms20150236. Disponível em: https://www.msjonline.org/index.php/ijrms/article/view/1561. Acesso em: 14 oct. 2025.