“Mass Determination of Lens Galaxies using Einstein Rings” (2024) iJournals:International Journal of Software & Hardware Research in Engineering ISSN:2347-4890, 12(12). पर उपलब्ध: https://ijournals.in/journal/index.php/ijshre/article/view/316 (अंतिम उपयोग: 20 अक्टूबर 2026).