House, R., K. Krajnak, A. Thompson, and D. Jiang. “Effect of Hand-Arm Vibration and Proximal Neuropathy on Current Perception Threshold Measurement in the Fingers”. Canadian Acoustics, vol. 39, no. 2, June 2011, pp. 68-69, https://jcaa.caa-aca.ca/index.php/jcaa/article/view/2361.