de Zeeuw, P. T.; Hoogerwerf, R.; de Bruijne, J. H. J.; Brown, A. G. A.; Blaauw, A.. (1999). «A HIPPARCOS Census of the Nearby OB Associations» The Astronomical Journal 117 (1): 354–399. doi:10.1086/300682. Bibcode: 1999AJ....117..354D..
Lyder, David A.. (November 2001). «The Stars in Camelopardalis OB1: Their Distance and Evolutionary History» The Astronomical Journal 122 (5): 2634-2643. doi:10.1086/323705. Bibcode: 2001AJ....122.2634L..
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Israelian, Garik. (1997). «Obituary: Victor Amazaspovich Ambartsumian, 1912 [i.e. 1908] -1996» Bulletin of the American Astronomical Society 29 (4): 1466–1467. Bibcode: 1997BAAS...29.1466I..
Herbst, W.. (1976). «R associations. I - UBV photometry and MK spectroscopy of stars in southern reflection nebulae» Astronomical Journal 80: 212–226. doi:10.1086/111734. Bibcode: 1975AJ.....80..212H..
de Zeeuw, P. T.; Hoogerwerf, R.; de Bruijne, J. H. J.; Brown, A. G. A.; Blaauw, A.. (1999). «A HIPPARCOS Census of the Nearby OB Associations» The Astronomical Journal 117 (1): 354–399. doi:10.1086/300682. Bibcode: 1999AJ....117..354D..
Lyder, David A.. (November 2001). «The Stars in Camelopardalis OB1: Their Distance and Evolutionary History» The Astronomical Journal 122 (5): 2634-2643. doi:10.1086/323705. Bibcode: 2001AJ....122.2634L..
ui.adsabs.harvard.edu
Herbst, W.. (1976). «R associations. I - UBV photometry and MK spectroscopy of stars in southern reflection nebulae» Astronomical Journal 80: 212–226. doi:10.1086/111734. Bibcode: 1975AJ.....80..212H..Herbst, W. (1976). "R associations. I - UBV photometry and MK spectroscopy of stars in southern reflection nebulae". Astronomical Journal. 80: 212–226. Bibcode:1975AJ.....80..212H. doi:10.1086/111734.