“Research on the Optimization of Air Route Networks in the Yangtze River Delta and Beijing-Tianjin-Hebei Urban Agglomerations from the Perspective of Spatial Interaction Intensityensity” (2024) Journal of Intelligence Technology and Innovation, 2(1), pp. 26–37. Available at: https://itip-submit.com/index.php/JITI/article/view/JITI-22-DOI.pdf (Accessed: 23 December 2024).