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Neilson, H. R.; Lester, J. B.; Haubois, X. (December 2011). Weighing Betelgeuse: Measuring the Mass of α Orionis from Stellar Limb-darkening. 9th Pacific Rim Conference on Stellar Astrophysics. Proceedings of a conference held at Lijiang, China in 14–20 April 2011. ASP Conference Series. Astronomical Society of the Pacific. Vol. 451. p. 117. arXiv:1109.4562. Bibcode:2011ASPC..451..117N.
Kervella, P.; Verhoelst, T.; และคณะ (September 2009). "The Close Circumstellar Environment of Betelgeuse. Adaptive Optics Spectro-imaging in the Near-IR with VLT/NACO". Astronomy and Astrophysics. 504 (1): 115–25. arXiv:0907.1843. Bibcode:2009A&A...504..115K. doi:10.1051/0004-6361/200912521.