Frinchaboy, Peter M. (2008). "Open Clusters as Galactic Disk Tracers. I. Project Motivation, Cluster Membership, and Bulk Three-Dimensional Kinematics". The Astronomical Journal. 136: 118–145. arXiv:0804.4630. Bibcode:2008AJ....136..118F. doi:10.1088/0004-6256/136/1/118.Parameter |coauthors= yang tidak diketahui mengabaikan (|author= yang disarankan) (bantuan) See table I, p. 12.
doi.org
Frinchaboy, Peter M. (2008). "Open Clusters as Galactic Disk Tracers. I. Project Motivation, Cluster Membership, and Bulk Three-Dimensional Kinematics". The Astronomical Journal. 136: 118–145. arXiv:0804.4630. Bibcode:2008AJ....136..118F. doi:10.1088/0004-6256/136/1/118.Parameter |coauthors= yang tidak diketahui mengabaikan (|author= yang disarankan) (bantuan) See table I, p. 12.
harvard.edu
adsabs.harvard.edu
Frinchaboy, Peter M. (2008). "Open Clusters as Galactic Disk Tracers. I. Project Motivation, Cluster Membership, and Bulk Three-Dimensional Kinematics". The Astronomical Journal. 136: 118–145. arXiv:0804.4630. Bibcode:2008AJ....136..118F. doi:10.1088/0004-6256/136/1/118.Parameter |coauthors= yang tidak diketahui mengabaikan (|author= yang disarankan) (bantuan) See table I, p. 12.
ngcicproject.org
"NGC 457". The NGC/IC Project Database. Diarsipkan dari versi asli tanggal 2012-05-20. Diakses tanggal 2012-05-09.
web.archive.org
"NGC 457". The NGC/IC Project Database. Diarsipkan dari versi asli tanggal 2012-05-20. Diakses tanggal 2012-05-09.