Paunzen, E.; Netopil, M.; Maitzen, H. M.; Pavlovski, K.; Schnell, A.; Zejda, M. (2014), "Photoelectric search for peculiar stars in open clusters", Astronomy & Astrophysics, 564: A42, arXiv:1403.3538, doi:10.1051/0004-6361/201423521, S2CID119174151
Paunzen, E.; Netopil, M.; Maitzen, H. M.; Pavlovski, K.; Schnell, A.; Zejda, M. (2014), "Photoelectric search for peculiar stars in open clusters", Astronomy & Astrophysics, 564: A42, arXiv:1403.3538, doi:10.1051/0004-6361/201423521, S2CID119174151
seds.org
messier.seds.org
"NGC 6633". messier.seds.org. Archived from the original on 2021-01-18. Retrieved 2020-10-05.
semanticscholar.org
api.semanticscholar.org
Paunzen, E.; Netopil, M.; Maitzen, H. M.; Pavlovski, K.; Schnell, A.; Zejda, M. (2014), "Photoelectric search for peculiar stars in open clusters", Astronomy & Astrophysics, 564: A42, arXiv:1403.3538, doi:10.1051/0004-6361/201423521, S2CID119174151
web.archive.org
"NGC 6633". messier.seds.org. Archived from the original on 2021-01-18. Retrieved 2020-10-05.