@article{Classen:2019/w,
  author = "Classen, Lew  and  Dorn, Christian  and  Kappes, Alexander  and  Karg, Timo  and  Kossatz, Marko  and  Kretzschmann, Axel  and  Ortjohann, Hans-Werner  and  Reubelt, Jonas  and  Sulanke, Karl-Heinz  and  Weigel, Robert",
  title = "{A multi-PMT Optical Module for the IceCube Upgrade}",
  doi = "10.22323/1.358.0855",
  journal = "PoS",
  year = 2019,
  volume = "ICRC2019",
  pages = "855"
}