Ferreira, Bárbara Amaral, et al. “DETERMINATION OF THE VENTILATORY ANAEROBIC THRESHOLD BY THE RESPONSE OF THE CARDIAC FREQUENCY OF INDIVIDUALS WITH A RISK FACTOR FOR CARDIOVASCULAR DISEASES: COMPARISON WITH A VISUAL METHOD”. Journal of Respiratory and CardioVascular Physical Therapy, vol. 9, no. 1, Mar. 2020, pp. 20-28, https://periodicos.ufrn.br/revistadefisioterapia/article/view/17281.