Reynolds, S. P.; Borkowski, K. J.; Hwang, U.; Hughes, J. P.; Badenes, C.; Laming, J. M.; Blondin, J. M. (2 October 2007). ”A Deep Chandra Observation of Kepler's Supernova Remnant: A Type Ia Event with Circumstellar Interaction”. The Astrophysical Journal 668 (2): sid. L135–L138. doi:10.1086/522830. Bibcode: 2007ApJ...668L.135R.
Reynolds, S. P.; Borkowski, K. J.; Hwang, U.; Hughes, J. P.; Badenes, C.; Laming, J. M.; Blondin, J. M. (2 October 2007). ”A Deep Chandra Observation of Kepler's Supernova Remnant: A Type Ia Event with Circumstellar Interaction”. The Astrophysical Journal 668 (2): sid. L135–L138. doi:10.1086/522830. Bibcode: 2007ApJ...668L.135R.