@article{dong2021homophily,
    title={Birds of a feather flock together: A close look at cooperation emergence via multi-agent rl},
    author={Dong, Heng and Wang, Tonghan and Liu, Jiayuan and Han, Chi and Zhang, Chongjie},
    journal={arXiv preprint arXiv:2104.11455},
    year={2021}
}