Mario Quiles, Enrique T. Martinez, Sergio Lopez, Alberto Huertas, Gregorio Martinez: Breaching subjects? thoughts privacy: a study with visual stimuli and brain-computer interfaces; Hindawi, Journal of Healthcare Engineering, Vol. 2021, No. 1, August 2021, pp 1-2. URL: https://www.hindawi.com/journals/jhe/2021/5517637/.