“Comparative study of Devnagari script on porous and non-porous surfaces using unconventional writing instruments”, IJSRC, vol. 13, no. 6, जून 2025, अंतिम उपयोग: अक्ट. 21, 2026. पर उपलब्ध: https://ijournals.in/journal/index.php/ijsrc/article/view/355