Spatial distribution and influencing factors of Surface Nibble Degree index in the severe gully erosion region of China's Loess Plateau
ZHOU Yi, YANG Caiqin, LI Fan, CHEN Rong
地理学报(英文版) . 2021, (11): 1575 -1597 .  DOI: 10.1007/s11442-021-1912-2