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R. S. Priddey, R. G. McMahon (2001). «The far-infrared-submillimetre spectral energy distribution of high-redshift quasars». Monthly Notices of the Royal Astronomical Society324 (1): L17–L22. doi:10.1046/j.1365-8711.2001.04548.x. Bibcode: 2001MNRAS.324L..17P.
S.P. Driver, A. Fernandez-Soto, W.J. Couch, S.C. Odewahn, R.A. Windhorst, S. Phillips, K. Lanzetta, A. Yahil (1998). «Morphological Number Counts and Redshift Distributions to I<26 from the Hubble Deep Field: Implications for the Evolution of Ellipticals, Spirals, and Irregulars». Astrophysical Journal496 (2): L93–L96. doi:10.1086/311257. Bibcode: 1998ApJ...496L..93D.
R. S. Priddey, R. G. McMahon (2001). «The far-infrared-submillimetre spectral energy distribution of high-redshift quasars». Monthly Notices of the Royal Astronomical Society324 (1): L17–L22. doi:10.1046/j.1365-8711.2001.04548.x. Bibcode: 2001MNRAS.324L..17P.