VARGO, Fran. Gardner, K. R. and Montgomery, P.S. (1977). <i>Clinical Biofeedback: A Procedural Manual.</i>. Canadian Journal of Counselling and Psychotherapy, [S. l.], v. 12, n. 4, 2012. Disponível em: https://cdm.ucalgary.ca/index.php/rcc/article/view/60204. Acesso em: 5 jan. 2026.