@inproceedings{Fujii:2023+W,
  author = "Fujii, Shingo",
  title = "{Calibration of the integrating sphere for O4 in KAGRA gravitational wave telescope}",
  doi = "10.22323/1.444.1553",
  booktitle = "Proceedings of 38th International Cosmic Ray Conference {\textemdash} PoS(ICRC2023)",
  year = 2023,
  volume = "444",
  pages = "1553"
}