Bilic, L., Ebner, M. and Ebner, M. (2020) “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(03), pp. pp. 226–232. doi: 10.3991/ijim.v14i03.12311.