Bilic, Leonardo, Markus Ebner, and Martin Ebner. “A Voice-Enabled Game Based Learning Application Using Amazon’s Echo With Alexa Voice Service: A Game Regarding Geographic Facts About Austria and Europe”. International Journal of Interactive Mobile Technologies (iJIM) 14, no. 03 (February 28, 2020): pp. 226–232. Accessed April 25, 2024. https://online-journals.org/index.php/i-jim/article/view/12311.