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. ISBN978-90-277-2476-2.
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.
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. ISBN978-90-277-2476-2.
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.