Xin Wang Shu-Juan Ji Yongquan Liang 0001 Ho-fung Leung Dickson K. W. Chiu An unsupervised strategy for defending against multifarious reputation attacks. 4189-4210 2019 49 Appl. Intell. 12 https://doi.org/10.1007/s10489-019-01490-9 db/journals/apin/apin49.html#WangJLLC19