1. From Eliza to XiaoIce: challenges and opportunities with social chatbots;Shum;Front. Inf. Technol. Electron. Eng.,2018
2. Conversational AI: dialogue systems, conversational agents, and chatbots;McTear;Synth. Lect. Hum. Lang. Technol.,2020
3. J. Walker, “Chatbot comparison-Facebook, Microsoft, Amazon, and Google,” EMERG. Accessed July, vol. 20, p. 2019, 2018.
4. W. Zaghouani, “Critical survey of the freely available Arabic corpora,” arXiv Prepr. arXiv1702.07835, 2017.
5. The return of the chatbots;Dale;Nat. Lang. Eng.,2016