SimProp: a Simulation Code for Ultra High Energy Cosmic Ray Propagation
  A new Monte Carlo simulation code for the propagation of Ultra High Energy Cosmic Rays is presented. The results of this simulation scheme are tested by comparison with results of another Monte Carlo computation as well as with the results obtained by directly solving the kinetic equation for the propagation of Ultra High Energy Cosmic Rays. A short comparison with the latest flux published by the Pierre Auger collaboration is also presented. 
R. Aloisio, D. Boncioli, A. F. Grillo, S. Petrera, F. Salamida
astro-ph.HE hep-ph