@article{Kagaya:2016iH,
  author = "Kagaya, Mika  and  Katagiri, Hideaki  and  Yoshida, Tatsuo",
  title = "{Constraints on acceleration of ultra high-energy cosmic rays in Fermi gamma-ray sources }",
  doi = "10.22323/1.236.0530",
  journal = "PoS",
  year = 2016,
  volume = "ICRC2015",
  pages = "530"
}