@inproceedings{Nakamura:2023Dy,
  author = "Nakamura, Kouji",
  title = "{Proposal of a gauge-invariant treatment of l=0,1-mode perturbations on the Schwarzschild background spacetime}",
  doi = "10.22323/1.444.1543",
  booktitle = "Proceedings of 38th International Cosmic Ray Conference {\textemdash} PoS(ICRC2023)",
  year = 2023,
  volume = "444",
  pages = "1543"
}