Hirotani, Kouichi Prof. Heinrich J. Völk, Emeriti, MPI for Nuclear Physics, Max Planck Society;
Hirotani, K., Harding, A. K., & Shibata, S. (2003). Electrodynamics of an Outer-Gap Accelerator: Formation of a Soft Power-Law Spectrum between 100 MeV and 3 GeV. The Astrophysical Journal, 591(1), 334-353.