M. . Singh, A. . Kumar, K. . Yadav, H. . Madhu, and T. . Mukherjee, “Mauka-Mauka : Measuring and Predicting Opportunities for Webcam-based Heart Rate Sensing in Workplace Environment”, EAI Endorsed Trans Perv Health Tech, vol. 2, no. 7, p. e3, Dec. 2015.