Dr JAI NANDAN SINGH. “A HISTORICAL JOURNEY OF NUMBER THEORY”. Journal of Validation Technology, ISSN: 1079-6630, E-I SSN: 2150-7090 UGC CARE II, vol. 18, no. 4, Oct. 2025, pp. 1-48, https://jvtnetwork.com/index.php/journals/article/view/144.