Bhardwaj, Raj Kumar, Ritesh Kumar, and Dr Mohammad Nazim. “Structure and Functions of Metasearch Engines: An Evaluative Study”. DESIDOC Journal of Library & Information Technology 43, no. 03 (July 6, 2023): 145–156. Accessed June 27, 2025. https://publications.drdo.gov.in/ojs/index.php/djlit/article/view/18303.