^梅西耶39. SEDS Messier Catalog. [2022年4月29日]. (原始内容存档于2022年8月16日).
^ 4.04.1WEBDA page Lynga catalogue data, Department of Theoretical Physics and Astrophysics of the Masaryk University, [18 February 2018], (原始内容存档于2012-03-26).
^ 7.07.17.27.3Streicher, Magda, Sky Delights: Another Cross, Monthly Notes of the Astronomical Society of Southern Africa, October 2015, 74 (10): 243–248, Bibcode:2015MNSSA..74..243S.
^ 8.08.1Bone, Neil, Sky notes for 2005 August and September, Journal of the British Astronomical Association, August 2005, 115 (4): 230, Bibcode:2005JBAA..115..230B.
^Zakirov, M. M.; et al, Variability of HD205117 in the Open Cluster M39 (NGC 7092), Information Bulletin on Variable Stars, July 1995, 4220: 1, Bibcode:1995IBVS.4220....1Z.
^Gray, R. O.; Corbally, C. J., A Spectroscopic Search for λ Bootis and Other Peculiar A-Type Stars in Intermediate-Age Open Clusters, The Astronomical Journal, August 2002, 124 (2): 989–1000, Bibcode:2002AJ....124..989G, doi:10.1086/341609.
^Schuff, Sarah; et al, A Search for Variable Stars in the Field of NGC 7092 (M39), Bulletin of the American Astronomical Society, December 2006, 38: 1135, Bibcode:2006AAS...20916514S.