Katsarou, E., Wild, F., Sougari, A.-M., & Chatzipanagiotou, P. (2023). A Systematic Review of Voice-based Intelligent Virtual Agents in EFL Education. International Journal of Emerging Technologies in Learning (iJET), 18(10), pp. 65–85. https://doi.org/10.3991/ijet.v18i10.37723