1. E. Aliu et al., Observation of pulsed gamma-rays above 25 GeV from the crab pulsar with MAGIC. Science 322, 1221 (2008)
2. W.I. Axford, E. Leer, G. Skadron. The acceleration of cosmic rays by shock waves, in Proceedings of the 15th International Cosmic Ray Conference, vol 11 (1977) pp. 132–135
3. A.R. Bell, The acceleration of cosmic rays in shock fronts. Mon. Not. R. Astron. Soc. 182, 147–156 (1978)
4. E. Berezhko, Maximum energy of cosmic rays accelerated by supernova shocks. Astropart. Phys. 5, 367–378 (1996)
5. V.S. Berezinsky et al., Astrophysics of Cosmic Rays (North Holland, Amsterdam, 1990)