Redshift evolution of X-ray spectral index of quasars observed by XMM-NEWTON/SDSS
Citation:
SH.M.Shehataa, R.Misrab, A.M.I.Osmana, O.M.Shalabiea, and Z.M.Hayman,
"Redshift evolution of X-ray spectral index of quasars observed by XMM-NEWTON/SDSS",
Journal of High Energy Astrophysics, vol. Volume 31, pp. 37-43, 2021.
