Pu H, Zhang H, Liu Y, Cai H. Graph Contrastive Learning with Balanced Hard Negatives and Fine-grained Semantic-aware Positives. AAAI [Internet]. 2026Mar.14 [cited 2026Apr.29];40(29):24873-81. Available from: https://ojs.aaai.org/index.php/AAAI/article/view/39674