@article{Väisänen:20195f,
  author = "Väisänen, Pauli  and  Usoskin, Ilya  and  Mursula, Kalevi",
  title = "{Spectral slope analysis of long-term cosmic-rayvariations at Earth}",
  doi = "10.22323/1.358.1165",
  journal = "PoS",
  year = 2019,
  volume = "ICRC2019",
  pages = "1165"
}