1. A. Achterberg, The energy spectrum of electrons accelerated by weak magnetohydrodynamic turbulence. Astron. Astrophys. 76, 276–286 (1979)
2. A. Achterberg, Modification of scattering waves and its importance for shock acceleration. Astron. Astrophys. 119, 274–278 (1983)
3. A. Achterberg, R.D. Blandford, Transmission and damping of hydromagnetic waves behind a strong shock front—implications for cosmic ray acceleration. Mon. Not. R. Astron. Soc. 218, 551–575 (1986)
4. F.A. Aharonian, A.M. Atoyan, On the emissivity of π^0^-decay gamma radiation in the vicinity of accelerators of galactic cosmic rays. Astron. Astrophys. 309, 917–928 (1996)
5. E. Amato, The streaming instability: a review. Mem. Soc. Astron. Ital. 82, 806 (2011)