N. Gordon, C. R. Abbiss, A. J. Maiorana, K. J. Marston, and J. J. Peiffer, “INTRARATER RELIABILITY AND AGREEMENT OF THE PHYSIOFLOW BIOIMPEDANCE CARDIOGRAPHY DEVICE DURING REST, MODERATE AND HIGH-INTENSITY EXERCISE”, Kinesiology, vol. 50, no. 1, pp. 140–149, Jan. 2018.