Landslide susceptibility mapping using an entropy index-based negative sample selection strategy: A case study of Luolong county - Kong Yuzhong; Wu Hua; Xu Chong; Sun Jingjing; Zhu Kangcheng; Zhang Chenguang; Zhou Jianwei; Xu Tong; Su Taijin; Zhang Zelin; Kong Hui (PLoS ONE, 2025)