Yi, Xianjian, Xinyue Gu, and Qiru Zhong. “Quantifying the Nonlinear Factors of Urban Shrinkage: A Case Study in Heilongjiang Province, China”. Highlights in Business, Economics and Management 26 (February 24, 2024): 109–116. Accessed June 27, 2026. https://drpress.org/ojs/index.php/HBEM/article/view/17738.