Majaess, D. J.; Turner, D.; Lane, D. (2007). “In Search of Possible Associations between Planetary Nebulae and Open Clusters”. Publications of the Astronomical Society of the Pacific. 119 (862): 1349. arXiv:0710.2900. Bibcode:2007PASP..119.1349M. doi:10.1086/524414.
Kiss, L. L.; Szabó, Gy. M.; Balog, Z.; Parker, Q. A.; và đồng nghiệp (2008). “AAOmega radial velocities rule out current membership of the planetary nebula NGC 2438 in the open cluster M46”. Monthly Notices of the Royal Astronomical Society. 391 (1): 399–404. arXiv:0809.0327. Bibcode:2008MNRAS.391..399K. doi:10.1111/j.1365-2966.2008.13899.x.
Vickers S. B.; Frew D. J.; Parker Q. A.; Bojicic I. S. (2015). “New light on Galactic post-asymptotic giant branch stars - I. First distance catalogue”. Monthly Notices of the Royal Astronomical Society. 447 (2): 1673. arXiv:1403.7230. Bibcode:2015MNRAS.447.1673V. doi:10.1093/mnras/stu2383.
Majaess, D. J.; Turner, D.; Lane, D. (2007). “In Search of Possible Associations between Planetary Nebulae and Open Clusters”. Publications of the Astronomical Society of the Pacific. 119 (862): 1349. arXiv:0710.2900. Bibcode:2007PASP..119.1349M. doi:10.1086/524414.
Kiss, L. L.; Szabó, Gy. M.; Balog, Z.; Parker, Q. A.; và đồng nghiệp (2008). “AAOmega radial velocities rule out current membership of the planetary nebula NGC 2438 in the open cluster M46”. Monthly Notices of the Royal Astronomical Society. 391 (1): 399–404. arXiv:0809.0327. Bibcode:2008MNRAS.391..399K. doi:10.1111/j.1365-2966.2008.13899.x.
Mermilliod J. -C.; Clariá J. J.; Andersen J.; Piatti A. E.; Mayor M. (2001). “Red giants in open clusters. IX. NGC 2324, 2818, 3960 and 6259”. Astronomy and Astrophysics. 375: 30–39. Bibcode:2001A&A...375...30M. doi:10.1051/0004-6361:20010845.
Vickers S. B.; Frew D. J.; Parker Q. A.; Bojicic I. S. (2015). “New light on Galactic post-asymptotic giant branch stars - I. First distance catalogue”. Monthly Notices of the Royal Astronomical Society. 447 (2): 1673. arXiv:1403.7230. Bibcode:2015MNRAS.447.1673V. doi:10.1093/mnras/stu2383.
Majaess, D. J.; Turner, D.; Lane, D. (2007). “In Search of Possible Associations between Planetary Nebulae and Open Clusters”. Publications of the Astronomical Society of the Pacific. 119 (862): 1349. arXiv:0710.2900. Bibcode:2007PASP..119.1349M. doi:10.1086/524414.
Kiss, L. L.; Szabó, Gy. M.; Balog, Z.; Parker, Q. A.; và đồng nghiệp (2008). “AAOmega radial velocities rule out current membership of the planetary nebula NGC 2438 in the open cluster M46”. Monthly Notices of the Royal Astronomical Society. 391 (1): 399–404. arXiv:0809.0327. Bibcode:2008MNRAS.391..399K. doi:10.1111/j.1365-2966.2008.13899.x.
Mermilliod J. -C.; Clariá J. J.; Andersen J.; Piatti A. E.; Mayor M. (2001). “Red giants in open clusters. IX. NGC 2324, 2818, 3960 and 6259”. Astronomy and Astrophysics. 375: 30–39. Bibcode:2001A&A...375...30M. doi:10.1051/0004-6361:20010845.
Vickers S. B.; Frew D. J.; Parker Q. A.; Bojicic I. S. (2015). “New light on Galactic post-asymptotic giant branch stars - I. First distance catalogue”. Monthly Notices of the Royal Astronomical Society. 447 (2): 1673. arXiv:1403.7230. Bibcode:2015MNRAS.447.1673V. doi:10.1093/mnras/stu2383.