Nandhika, T. P., and A. . Nugroho. “Implementation of a Real-Time Chat System Based on the MERN Stack and Socket.Io With Natural Language Processing Integration for Automatic Sentiment Analysis”. Eduvest - Journal of Universal Studies, vol. 6, no. 9, Sept. 2026, pp. 9724-32, doi:10.59188/eduvest.v6i9.53370.