@inproceedings{Reimer:2011b4,
  author = "Reimer, Anita",
  title = "{Constraints on the gamma-ray opacity of the Universe with the Fermi-LAT instrument}",
  doi = "10.22323/1.121.0013",
  booktitle = "Proceedings of Cosmic Radiation Fields: Sources in the early Universe {\textemdash} PoS(CRF 2010)",
  year = 2011,
  volume = "121",
  pages = "013"
}