Gao, Zhenyu, and Yaoben Gong. “Using PID-BP Digital Virtual Reality for Non-Heritage Protection: Recognition and Assessment”. HighTech and Innovation Journal 6, no. 3 (September 1, 2025): 918–932. Accessed November 19, 2025. https://www.hightechjournal.org/index.php/HIJ/article/view/1188.