@article{JMLR:v26:24-0187,
  author  = {Youcheng Niu and Jinming Xu and Ying Sun and Yan Huang and Li Chai},
  title   = {Distributed Stochastic Bilevel Optimization: Improved Complexity and Heterogeneity Analysis},
  journal = {Journal of Machine Learning Research},
  year    = {2025},
  volume  = {26},
  number  = {76},
  pages   = {1--58},
  url     = {http://jmlr.org/papers/v26/24-0187.html}
}