Xie, Zhihan, Peiyu Jia, Jie Song, Ruidong Zhao, and Hui Jin. “Evaluation of the Tourism Economic Spatial Network Structure of the Urban Agglomerations in the Middle Reaches of the Yellow River Based on a Modified Gravity Model”. Transformations In Business & Economics 23, no. 2 (62) (September 2, 2024): 319–342. Accessed May 23, 2026. https://www.zurnalai.vu.lt/TIBE/article/view/36685.