Fesen, Robert A.; Hammell, Molly C.; Morse, Jon; Chevalier, Roger A.; Borkowski, Kazimierz J.; Dopita, Michael A.; Gerardy, Christopher L.; Lawrence, Stephen S.; Raymond, John C.; van den Bergh, Sidney. The Expansion Asymmetry and Age of the Cassiopeia A Supernova Remnant. The Astrophysical Journal. July 2006, 645 (1): 283–292. Bibcode:2006ApJ...645..283F. arXiv:astro-ph/0603371. doi:10.1086/504254.
Fesen, Robert A.; Hammell, Molly C.; Morse, Jon; Chevalier, Roger A.; Borkowski, Kazimierz J.; Dopita, Michael A.; Gerardy, Christopher L.; Lawrence, Stephen S.; Raymond, John C.; van den Bergh, Sidney. The Expansion Asymmetry and Age of the Cassiopeia A Supernova Remnant. The Astrophysical Journal. July 2006, 645 (1): 283–292. Bibcode:2006ApJ...645..283F. arXiv:astro-ph/0603371. doi:10.1086/504254.
Elshamouty, K. G.; Heinke, C. O.; Sivakoff, G. R.; Ho, W. C. G.; Shternin, P. S.; Yakovlev, D. G.; Patnaude, D. J.; David, L. Measuring the cooling of the neutron star in Cassiopeia A with all Chandra X-Ray Observatory detectors. Astrophysical Journal. 2013, 777 (1): 22. doi:10.1088/0004-637X/777/1/22.
Fesen, Robert A.; Hammell, Molly C.; Morse, Jon; Chevalier, Roger A.; Borkowski, Kazimierz J.; Dopita, Michael A.; Gerardy, Christopher L.; Lawrence, Stephen S.; Raymond, John C.; van den Bergh, Sidney. The Expansion Asymmetry and Age of the Cassiopeia A Supernova Remnant. The Astrophysical Journal. July 2006, 645 (1): 283–292. Bibcode:2006ApJ...645..283F. arXiv:astro-ph/0603371. doi:10.1086/504254.
Baars, J. W. M.; Genzel, R.; Pauliny-Toth, I. I. K.; Witzel, A. The Absolute Spectrum of Cas A; An Accurate Flux Density Scale and a Set of Secondary Calibrators. Astronomy and Astrophysics. 1977, 61: 99. Bibcode:1977A&A....61...99B.
Bowyer S, Byram ET, Chubb TA, Friedman H. Steinberg JL , 编. Observational results of X-ray astronomy. Astronomical Observations from Space Vehicles, Proceedings from Symposium no. 23 held in Liege, Belgium, 17 to 20 August 1964. Symposium (International Astronomical Union). 1965, no. 23: 227–39. Bibcode:1965IAUS...23..227B.