Most Mahabuba Islam, Debmalya Mukherjee, Ranjan Banerjee, Shuvrajit Nath, Mithun Biswas. (2025). From Simple Scripts to Sentient Conversations: Tracing NLP’s Influence on Chatbot Development. European Economic Letters (EEL), 15(1), 1829–1839. https://doi.org/10.52783/eel.v15i1.2567