@article{regretlowerboundsforlearninglinear,
  title = {Regret Lower Bounds for Learning Linear Quadratic Gaussian Systems},
  author = {Ingvar Ziemann and Henrik Sandberg},
  year = {2022},
  eprint = {2201.01680},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2201.01680v4},
}