Zhao, Yi. “The Difficulties and Explorations of Old Community Retrofitting Based on the Sponge City Concept - The Case of 240 Community in the Old Urban Area of Xi’an”. Highlights in Business, Economics and Management 26 (February 24, 2024): 124–129. Accessed July 28, 2026. https://drpress.org/ojs/index.php/HBEM/article/view/17740.