@article{Hütten:2017+S, author = "Hütten, Moritz and Karg, Timo and Schwerdt, Carolin and Steppa, Constantin and Walter, Michael", title = "{The International Cosmic Day – An Outreach Event for Astroparticle Physics}", doi = "10.22323/1.301.0405", journal = "PoS", year = 2017, volume = "ICRC2017", pages = "405" }