Haardt, F., & Maraschi, L. A two-phase model for the X-ray emission from Seyfert galaxies. Astrophysical Journal. 1991, 380: L51–L54. Bibcode:1991ApJ...380L..51H. doi:10.1086/186171.
Haardt, F., & Maraschi, L. A two-phase model for the X-ray emission from Seyfert galaxies. Astrophysical Journal. 1991, 380: L51–L54. Bibcode:1991ApJ...380L..51H. doi:10.1086/186171.