Ahmad, S. .; Jena, K. K. .; Rai, A. K. . Comparative Analysis of AI-Driven Conversational Agents for Mental Health Support: Rule-Based, Transformer, and RAG Approaches. DMP.LNMR 2026, No. IMPACT26, 571-581. https://doi.org/10.65890/dmp.lnmr.IMPACT26.99.