Frydrych, Piotr, and Roman Szewczyk. “Capacitive Human Presence Sensor for Safety Applications”. Journal of Automation, Mobile Robotics and Intelligent Systems 4, no. 3 (January 22, 2013): 45–49. Accessed May 17, 2024. https://www.jamris.org/index.php/JAMRIS/article/view/130.