Baoyu Jing Shengyu Feng Yuejia Xiang Xi Chen 0003 Yu Chen Hanghang Tong X-GOAL: Multiplex Heterogeneous Graph Prototypical Contrastive Learning. 894-904 2022 CIKM https://doi.org/10.1145/3511808.3557490 conf/cikm/2022 db/conf/cikm/cikm2022.html#JingFXCCT22