CRPropa: A public framework to propagate UHECRs in the universe R. Alves Batista, M. Erdmann, C. Evoli, K.-H. Kampert, D. Kuempel, G. Müller, G. Sigl, A. van Vliet, D. Walz and T. Winchen EPJ Web of Conferences, 99 (2015) 13004 Published online: 04 August 2015 DOI: 10.1051/epjconf/20159913004