@article{Aramo:20195l, author = "Aramo, Carla and Hemmer, Sabine", title = "{Outreach Cosmic Ray Activities (OCRA): a program of Astroparticle Physics Outreach Events for High-School Students}", doi = "10.22323/1.358.0173", journal = "PoS", year = 2019, volume = "ICRC2019", pages = "173" }