@misc{grimmer2023optimal,
      title={On Optimal Universal First-Order Methods for Minimizing Heterogeneous Sums}, 
      author={Benjamin Grimmer},
      year={2023},
      eprint={2208.08549},
      archivePrefix={arXiv},
      primaryClass={math.OC}
}

@article{nesterov2015universal,
  title={Universal gradient methods for convex optimization problems},
  author={Nesterov, Yu},
  journal={Mathematical Programming},
  volume={152},
  number={1},
  pages={381--404},
  year={2015},
  publisher={Springer}
}