KHAN, A.; MALIK, A. N. Association between hip flexor tightness and lumbar instability in adults. Journal of the Pakistan Medical Association, [S. l.], v. 73, n. 11, p. 2239–2241, 2023. DOI: 10.47391/JPMA.8221. Disponível em: https://mail.jpma.org.pk/index.php/public_html/article/view/8221. Acesso em: 19 apr. 2026.