Schuster, M. T.; Marengo, M.; Hora, J. L.; Fazio, G. G.; Humphreys, R. M.; Gehrz, R. D.; Hinz, P. M.; Kenworthy, M. A.; Hoffmann, W. F. (2009). “Imaging the Cool Hypergiant NML Cygni's Dusty Circumstellar Envelope with Adaptive Optics”. 《The Astrophysical Journal》 699 (2): 1423. arXiv:0904.4690. Bibcode:2009ApJ...699.1423S. doi:10.1088/0004-637X/699/2/1423.
Wright, N. J.; Drake, J. J.; Drew, J. E.; Vink, J. S. (2010). “The Massive Star-Forming Region Cygnus OB2. II. Integrated Stellar Properties and the Star Formation History”. 《The Astrophysical Journal》 713 (2): 871. arXiv:1003.2463. Bibcode:2010ApJ...713..871W. doi:10.1088/0004-637X/713/2/871.
Massey, P.; Degioia-Eastwood, K.; Waterhouse, E. (2001). “The Progenitor Masses of Wolf-Rayet Stars and Luminous Blue Variables Determined from Cluster Turnoffs. II. Results from 12 Galactic Clusters and OB Associations”. 《The Astronomical Journal》 121 (2): 1050. arXiv:astro-ph/0010654. Bibcode:2001AJ....121.1050M. doi:10.1086/318769.
Kiminki, D. C.; Kobulnicky, H. A.; Ewing, I.; Bagley Kiminki, M. M.; Lundquist, M.; Alexander, M.; Vargas-Alvarez, C.; Choi, H.; Henderson, C. B. (2012). “Additional Massive Binaries in the Cygnus OB2 Association”. 《The Astrophysical Journal》 747: 41. arXiv:1112.3383. Bibcode:2012ApJ...747...41K. doi:10.1088/0004-637X/747/1/41.
Kiminki, D. C.; Kobulnicky, H. A.; Kinemuchi, K.; Irwin, J. S.; Fryer, C. L.; Berrington, R. C.; Uzpen, B.; Monson, A. J.; Pierce, M. J.; Woosley, S. E. (2007). “A Radial Velocity Survey of the Cyg OB2 Association”. 《The Astrophysical Journal》 664 (2): 1102. arXiv:astro-ph/0609772. Bibcode:2007ApJ...664.1102K. doi:10.1086/513709.
Schuster, M. T.; Marengo, M.; Hora, J. L.; Fazio, G. G.; Humphreys, R. M.; Gehrz, R. D.; Hinz, P. M.; Kenworthy, M. A.; Hoffmann, W. F. (2009). “Imaging the Cool Hypergiant NML Cygni's Dusty Circumstellar Envelope with Adaptive Optics”. 《The Astrophysical Journal》 699 (2): 1423. arXiv:0904.4690. Bibcode:2009ApJ...699.1423S. doi:10.1088/0004-637X/699/2/1423.
Wright, Nicholas J.; Parker, Richard J.; Goodwin, Simon P.; Drake, Jeremy J. (2014). “Constraints on massive star formation: Cygnus OB2 was always an association”. 《Monthly Notices of the Royal Astronomical Society》 438: 639. Bibcode:2014MNRAS.438..639W. doi:10.1093/mnras/stt2232.
Wright, N. J.; Drake, J. J.; Drew, J. E.; Vink, J. S. (2010). “The Massive Star-Forming Region Cygnus OB2. II. Integrated Stellar Properties and the Star Formation History”. 《The Astrophysical Journal》 713 (2): 871. arXiv:1003.2463. Bibcode:2010ApJ...713..871W. doi:10.1088/0004-637X/713/2/871.
Massey, P.; Degioia-Eastwood, K.; Waterhouse, E. (2001). “The Progenitor Masses of Wolf-Rayet Stars and Luminous Blue Variables Determined from Cluster Turnoffs. II. Results from 12 Galactic Clusters and OB Associations”. 《The Astronomical Journal》 121 (2): 1050. arXiv:astro-ph/0010654. Bibcode:2001AJ....121.1050M. doi:10.1086/318769.
Rauw, G.; Vreux, J. ‐M.; Bohannan, B. (1999). “The Interacting Early‐Type Binary BD +40o4220 (V729 Cyg): Modeling the Colliding Winds Region”. 《The Astrophysical Journal》 517: 416. Bibcode:1999ApJ...517..416R. doi:10.1086/307185.
Kiminki, D. C.; Kobulnicky, H. A.; Ewing, I.; Bagley Kiminki, M. M.; Lundquist, M.; Alexander, M.; Vargas-Alvarez, C.; Choi, H.; Henderson, C. B. (2012). “Additional Massive Binaries in the Cygnus OB2 Association”. 《The Astrophysical Journal》 747: 41. arXiv:1112.3383. Bibcode:2012ApJ...747...41K. doi:10.1088/0004-637X/747/1/41.
De Becker, M.; Rauw, G.; Sana, H.; Pollock, A. M. T.; Pittard, J. M.; Blomme, R.; Stevens, I. R.; Van Loo, S. (2006). “XMM-Newton observations of the massive colliding wind binary and non-thermal radio emitter CygOB2#8A [O6If + O5.5III(f)]”. 《Monthly Notices of the Royal Astronomical Society》 371 (3): 1280. Bibcode:2006MNRAS.371.1280D. doi:10.1111/j.1365-2966.2006.10746.x.
Kiminki, D. C.; Kobulnicky, H. A.; Kinemuchi, K.; Irwin, J. S.; Fryer, C. L.; Berrington, R. C.; Uzpen, B.; Monson, A. J.; Pierce, M. J.; Woosley, S. E. (2007). “A Radial Velocity Survey of the Cyg OB2 Association”. 《The Astrophysical Journal》 664 (2): 1102. arXiv:astro-ph/0609772. Bibcode:2007ApJ...664.1102K. doi:10.1086/513709.
Schuster, M. T.; Marengo, M.; Hora, J. L.; Fazio, G. G.; Humphreys, R. M.; Gehrz, R. D.; Hinz, P. M.; Kenworthy, M. A.; Hoffmann, W. F. (2009). “Imaging the Cool Hypergiant NML Cygni's Dusty Circumstellar Envelope with Adaptive Optics”. 《The Astrophysical Journal》 699 (2): 1423. arXiv:0904.4690. Bibcode:2009ApJ...699.1423S. doi:10.1088/0004-637X/699/2/1423.
Knödlseder, J. (2000). “Cygnus OB2 - a young globular cluster in the Milky Way”. 《Astronomy and Astrophysics》 360: 539. Bibcode:2000A&A...360..539K.
Wright, Nicholas J.; Parker, Richard J.; Goodwin, Simon P.; Drake, Jeremy J. (2014). “Constraints on massive star formation: Cygnus OB2 was always an association”. 《Monthly Notices of the Royal Astronomical Society》 438: 639. Bibcode:2014MNRAS.438..639W. doi:10.1093/mnras/stt2232.
Wright, N. J.; Drake, J. J.; Drew, J. E.; Vink, J. S. (2010). “The Massive Star-Forming Region Cygnus OB2. II. Integrated Stellar Properties and the Star Formation History”. 《The Astrophysical Journal》 713 (2): 871. arXiv:1003.2463. Bibcode:2010ApJ...713..871W. doi:10.1088/0004-637X/713/2/871.
Massey, P.; Degioia-Eastwood, K.; Waterhouse, E. (2001). “The Progenitor Masses of Wolf-Rayet Stars and Luminous Blue Variables Determined from Cluster Turnoffs. II. Results from 12 Galactic Clusters and OB Associations”. 《The Astronomical Journal》 121 (2): 1050. arXiv:astro-ph/0010654. Bibcode:2001AJ....121.1050M. doi:10.1086/318769.
Rauw, G.; Vreux, J. ‐M.; Bohannan, B. (1999). “The Interacting Early‐Type Binary BD +40o4220 (V729 Cyg): Modeling the Colliding Winds Region”. 《The Astrophysical Journal》 517: 416. Bibcode:1999ApJ...517..416R. doi:10.1086/307185.
Kiminki, D. C.; Kobulnicky, H. A.; Ewing, I.; Bagley Kiminki, M. M.; Lundquist, M.; Alexander, M.; Vargas-Alvarez, C.; Choi, H.; Henderson, C. B. (2012). “Additional Massive Binaries in the Cygnus OB2 Association”. 《The Astrophysical Journal》 747: 41. arXiv:1112.3383. Bibcode:2012ApJ...747...41K. doi:10.1088/0004-637X/747/1/41.
De Becker, M.; Rauw, G.; Sana, H.; Pollock, A. M. T.; Pittard, J. M.; Blomme, R.; Stevens, I. R.; Van Loo, S. (2006). “XMM-Newton observations of the massive colliding wind binary and non-thermal radio emitter CygOB2#8A [O6If + O5.5III(f)]”. 《Monthly Notices of the Royal Astronomical Society》 371 (3): 1280. Bibcode:2006MNRAS.371.1280D. doi:10.1111/j.1365-2966.2006.10746.x.
Kiminki, D. C.; Kobulnicky, H. A.; Kinemuchi, K.; Irwin, J. S.; Fryer, C. L.; Berrington, R. C.; Uzpen, B.; Monson, A. J.; Pierce, M. J.; Woosley, S. E. (2007). “A Radial Velocity Survey of the Cyg OB2 Association”. 《The Astrophysical Journal》 664 (2): 1102. arXiv:astro-ph/0609772. Bibcode:2007ApJ...664.1102K. doi:10.1086/513709.