Tong, Z., M. Awan, and H. Qingyun. “An Analysis of the Relationship Between Immigration and the Development of Resource-Based Cities in China - Centered on Daqing and Yichun in Heilongjiang Province”. Pakistan Languages and Humanities Review, vol. 7, no. 2, Mar. 2023, pp. 47-57, doi:10.47205/plhr.2023(7-II)05.