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Keenan, Philip C.; McNeil, Raymond C. (1989), “The Perkins catalog of revised MK types for the cooler stars”, 《Astrophysical Journal Supplement Series》 71: 245, Bibcode:1989ApJS...71..245K, doi:10.1086/191373.
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Hoffleit, D.; Warren, Jr., W. H., 《The Bright Star Catalogue》 5 Revis판, Centre de Données astronomiques de Strasbourg ID V/50. HR 7597보관됨 2016-03-04 - 웨이백 머신, database entry. Accessed on line November 19, 2009.
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Hoffleit, D.; Warren, Jr., W. H., 《The Bright Star Catalogue》 5 Revis판, Centre de Données astronomiques de Strasbourg ID V/50. HR 7597보관됨 2016-03-04 - 웨이백 머신, database entry. Accessed on line November 19, 2009.
Hoffleit, D.; Warren, Jr., W. H., 《The Bright Star Catalogue》 5 Revis판, Centre de Données astronomiques de Strasbourg ID V/50. HR 7597보관됨 2016-03-04 - 웨이백 머신, database entry. Accessed on line November 19, 2009.