Intergalactic electromagnetic cascades in the magnetized Universe as a tool of astroparticle physics Timur Dzhatdoev, Emil Khalikov, Anna Kircheva, Egor Podlesnyi and Anastasia Telegina EPJ Web Conf., 191 (2018) 08009 Published online: 31 October 2018 DOI: 10.1051/epjconf/201819108009