Desikachary, K,; Hearnshaw, J.B. (1982). «The spectrum of Canopus. II - Analysis and composition». Royal Astronomical Society, Monthly Notices201: 707–21. Bibcode:1982MNRAS.201..707D. doi:10.1093/mnras/201.3.707. CS1 maint: Multiple names: authors list (link)
Desikachary, K,; Hearnshaw, J.B. (1982). «The spectrum of Canopus. II - Analysis and composition». Royal Astronomical Society, Monthly Notices201: 707–21. Bibcode:1982MNRAS.201..707D. doi:10.1093/mnras/201.3.707. CS1 maint: Multiple names: authors list (link)
illinois.edu
stars.astro.illinois.edu
Kaler, Jim (26 June 2009). «Canopus». Stars. University of Illinois. Henta 22. august 2015.