@article{buttari2020parallel,
  title={Parallel QR factorization of block-tridiagonal matrices},
  author={Buttari, Alfredo and Hauberg, S{\o}ren and Kodsi, Costy},
  journal={SIAM Journal on Scientific Computing},
  volume={42},
  number={6},
  pages={C313--C334},
  year={2020},
  publisher={SIAM}
}