Spatial agglomeration and driving mechanisms of low-altitude economy firms in China: Evidence from four major urban agglomerations
FU Qiang, LI Jingwen, ZHANG Jishuang, GUO Pengfei
PROGRESS IN GEOGRAPHY . 2026, (7): 1399 -1416 .  DOI: 10.18306/dlkxjz.2026.07.003