Mohammad Raihanul Islam Sathappan Muthiah Naren Ramakrishnan RumorSleuth: joint detection of rumor veracity and user stance. 131-136 2019 ASONAM https://doi.org/10.1145/3341161.3342916 conf/asunam/2019 db/conf/asunam/asonam2019.html#IslamMR19