Heart Rate Detection from the Supratrochlear Vessels using a Virtual Reality Headset integrated PPG Sensor. - Michal Gnacek; David Garrido-Leal; Ruben Nieto Lopez; Ellen Seiss; Theodoros Kostoulas; Emili Balaguer-Ballester; Ifigeneia Mavridou; Charles Nduka (ICMI Companion, 2020)