McSwain, M. Virginia; Gies, Douglas R. The Evolutionary Status of Be Stars: Results from a Photometric Study of Southern Open Clusters. The Astrophysical Journal Supplement Series. November 2005, 161 (1): 118–146. Bibcode:2005ApJS..161..118M. arXiv:astro-ph/0505032. doi:10.1086/432757.
McSwain, M. Virginia; Gies, Douglas R. The Evolutionary Status of Be Stars: Results from a Photometric Study of Southern Open Clusters. The Astrophysical Journal Supplement Series. November 2005, 161 (1): 118–146. Bibcode:2005ApJS..161..118M. arXiv:astro-ph/0505032. doi:10.1086/432757.
McSwain, M. Virginia; Gies, Douglas R. The Evolutionary Status of Be Stars: Results from a Photometric Study of Southern Open Clusters. The Astrophysical Journal Supplement Series. November 2005, 161 (1): 118–146. Bibcode:2005ApJS..161..118M. arXiv:astro-ph/0505032. doi:10.1086/432757.