Valentin, O., G. Viallet, and J. Voix. “EARtrodes: Towards a Wireless in-Ear Custom-Fitted Brain Computer Interface”. Canadian Acoustics, vol. 45, no. 3, Aug. 2017, pp. 142-3, https://jcaa.caa-aca.ca/index.php/jcaa/article/view/3067.