Sarajedini, Ata; Dotter, Aaron; Kirkpatrick, Allison (2009). "Deep 2MASS Photometry of M67 and Calibration of the Main-Sequence J - KS Color Difference as an Age Indicator". The Astrophysical Journal. 698 (2): 1872–1878. arXiv:0904.2907. Bibcode:2009ApJ...698.1872S. doi:10.1088/0004-637X/698/2/1872.
Yakut, K.; Zima, W.; Kalomeni, B.; Van Winckel, H.; Waelkens, C.; De Cat, P.; Bauwens, E.; Vučković, M.; Saesen, S. (2009). "Close binary and other variable stars in the solar-age Galactic open cluster M 67". Astronomy and Astrophysics. 503 (1): 165. arXiv:0906.4908. Bibcode:2009A&A...503..165Y. doi:10.1051/0004-6361/200911918.
Majaess, Daniel J.; Turner, David G.; Lane, David J.; Krajci, Tom (2011). "Deep Infrared ZAMS Fits to Benchmark Open Clusters Hosting delta Scuti Stars". Journal of the American Association of Variable Star Observers (Jaavso). 39 (2): 219. arXiv:1102.1705. Bibcode:2011JAVSO..39..219M.
Sarajedini, Ata; Dotter, Aaron; Kirkpatrick, Allison (2009). "Deep 2MASS Photometry of M67 and Calibration of the Main-Sequence J - KS Color Difference as an Age Indicator". The Astrophysical Journal. 698 (2): 1872–1878. arXiv:0904.2907. Bibcode:2009ApJ...698.1872S. doi:10.1088/0004-637X/698/2/1872.
Yakut, K.; Zima, W.; Kalomeni, B.; Van Winckel, H.; Waelkens, C.; De Cat, P.; Bauwens, E.; Vučković, M.; Saesen, S. (2009). "Close binary and other variable stars in the solar-age Galactic open cluster M 67". Astronomy and Astrophysics. 503 (1): 165. arXiv:0906.4908. Bibcode:2009A&A...503..165Y. doi:10.1051/0004-6361/200911918.
Sarajedini, Ata; Dotter, Aaron; Kirkpatrick, Allison (2009). "Deep 2MASS Photometry of M67 and Calibration of the Main-Sequence J - KS Color Difference as an Age Indicator". The Astrophysical Journal. 698 (2): 1872–1878. arXiv:0904.2907. Bibcode:2009ApJ...698.1872S. doi:10.1088/0004-637X/698/2/1872.
Yakut, K.; Zima, W.; Kalomeni, B.; Van Winckel, H.; Waelkens, C.; De Cat, P.; Bauwens, E.; Vučković, M.; Saesen, S. (2009). "Close binary and other variable stars in the solar-age Galactic open cluster M 67". Astronomy and Astrophysics. 503 (1): 165. arXiv:0906.4908. Bibcode:2009A&A...503..165Y. doi:10.1051/0004-6361/200911918.
Majaess, Daniel J.; Turner, David G.; Lane, David J.; Krajci, Tom (2011). "Deep Infrared ZAMS Fits to Benchmark Open Clusters Hosting delta Scuti Stars". Journal of the American Association of Variable Star Observers (Jaavso). 39 (2): 219. arXiv:1102.1705. Bibcode:2011JAVSO..39..219M.