1. GNEWUCH, U.; MORANA S.; MAEDCHE A.: Towards Designing Cooperative and Social Conversational Agents for Customer Service. In: Proceedings of the International Confernce on Information Systems 2017. Seoul, South Korea, 2017.
2. EUROSTAT: ISOC_EB_AI dataset. [online]. 2021. Available from WWW: https://ec.europa.eu/eurostat/databrowser/product/view/ISOC_EB_AI?lang=en
3. ISIDORE, R.; ARUN, J.: Are Indian Consumers Happy with Artificial Intelligence Enabled Personalized Customer Service. Academy of Marketing Studies Journal. 2021, Vol. 25, pp. 1-16. ISSN 10956298.
4. DUBIEL, M.; HALVEY, M.; AZZOPARDI, L.: A Survey Investigating Usage of Virtual Personal Assistants. arXiv:1807.04606. [online]. 2018. Available from WWW: http://arxiv.org/abs/1807.04606
5. TULSHAN, A.; DHAGE, N.: Survey on Virtual Assistant: Google Assistant, Siri, Cortana, Alexa. In: Thampi S.; Marques O.; Krishnan S.; Li K.; Ciuonzo D.; Kolekar M. (eds.), Advances in Signal Processing and Intelligent Recognition Systems. Singapore: Springer Singapore, 2019, pp. 190-201. ISBN 9789811357572. DOI: 10.1007/978-981-13-5758-9_17