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Usenko, I. A. et al. (2015). “Spectroscopic studies of four southern-hemisphere G–K supergiants: HD 192876 (α1 Cap), HD 194215 (HR 7801), HD 206834 (c Cap), and HD 222574 (104 Aqr)”. Astronomy Letters41 (11): 660–676. Bibcode: 2015AstL...41..660U. doi:10.1134/S1063773715110067. ISSN1063-7737.
Abell, G. O. (1955). “Globular Clusters and Planetary Nebulae Discovered on the National Geographic Society-Palomar Observatory Sky Survey”. Publications of the Astronomical Society of the Pacific67: 258. Bibcode: 1955PASP...67..258A. doi:10.1086/126815. ISSN0004-6280.
Usenko, I. A. et al. (2015). “Spectroscopic studies of four southern-hemisphere G–K supergiants: HD 192876 (α1 Cap), HD 194215 (HR 7801), HD 206834 (c Cap), and HD 222574 (104 Aqr)”. Astronomy Letters41 (11): 660–676. Bibcode: 2015AstL...41..660U. doi:10.1134/S1063773715110067. ISSN1063-7737.
Abell, G. O. (1955). “Globular Clusters and Planetary Nebulae Discovered on the National Geographic Society-Palomar Observatory Sky Survey”. Publications of the Astronomical Society of the Pacific67: 258. Bibcode: 1955PASP...67..258A. doi:10.1086/126815. ISSN0004-6280.
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