Kellermann, K. I.; Wall, J. V. (1987). "Radio Source Counts and Their Interpretation". Observational Cosmology: Proceedings of the IAU Symposium, Beijing, People's Republic of China, Aug. 25-30, 1986. Vol. 124. Dordrecht: D. Reidel Publishing Co. pp. 545–564. Bibcode:1987IAUS..124..545K. doi:10.1007/978-94-009-3853-3_56. ISBN 978-90-277-2476-2. 978-90-277-2476-2
"The FIRST log N - log S". http://sundog.stsci.edu/first/catalog_paper/node6.html
White, Richard L.; Becker, Robert H.; Helfand, David J.; Gregg, Michael D. (1997). "A Catalog of 1.4 GHz Radio Sources from the FIRST Survey". The Astrophysical Journal. 475 (2): 479. Bibcode:1997ApJ...475..479W. doi:10.1086/303564. /wiki/Bibcode_(identifier)
Bengaly, Carlos A. P.; Maartens, Roy; Santos, Mario G. (2018). "Probing the Cosmological Principle in the counts of radio galaxies at different frequencies". Journal of Cosmology and Astro-Particle Physics. 2018 (4): 031. arXiv:1710.08804. Bibcode:2018JCAP...04..031B. doi:10.1088/1475-7516/2018/04/031. S2CID 119182940. /wiki/ArXiv_(identifier)