Mapping Documents Onto Concept Databases for Threshold-Based Retrieval. - P. C. Reghu Raj; S. Raman 001 (ICEIS (2), 2003)

Phrase Grammar-Based Automatic Conceptual Tagging System. - P. C. Reghu Raj; S. Raman 001 (IKE, 2003)

Augmenting Phrase-Based Text Representation with Conceptual Indexing for Effective Retrieval. - Rupali Sharma; P. C. Reghu Raj; S. Raman 001 (IKE, 2003)

Design of a high speed string matching co-processor for NLP. - Vadali Srinivasa Murty; P. C. Reghu Raj; S. Raman 001 (VLSI Design, 2003)

Summarization and Categorization of Text Data in High-Level Data Cleaning for Information Retrieval. - M. Saravanan 001; P. C. Reghu Raj; S. Raman 001 (Appl. Artif. Intell., 2003)

A Phrase Grammar-Based Conceptual Indexing Paradigm. - P. C. Reghu Raj; S. Raman 001 (Appl. Artif. Intell., 2005)

Architecture of an Ontology-Based Domain-Specific Natural Language Question Answering System. - Athira P. M.; Sreeja M.; P. C. Reghu Raj (CoRR, 2013)

Effectiveness of Fuzzy Graph Based Document Model. - Aswathy M. R.; P. C. Reghu Raj; Ajeesh Ramanujan (KSII Trans. Internet Inf. Syst., 2024)

A novel technique using graph neural networks and relevance scoring to improve the performance of knowledge graph-based question answering systems. - Sincy V. Thambi; P. C. Reghu Raj (J. Intell. Inf. Syst., 2024)

TransQAM: Transformer-based Question Answering System in Malayalam. - Reji Rahmath K; P. C. Reghu Raj; Rafeeque P. C. (ACM Trans. Asian Low Resour. Lang. Inf. Process., 2025)