Haucke, M.; et al. (2018-06), “Wind properties of variable B supergiants. Evidence of pulsations connected with mass-loss episodes”, Astronomy & Astrophysics614: A91, Bibcode: 2018A&A...614A..91H, doi:10.1051/0004-6361/201731678
Howarth, Ian D.; et al. (1997-01), “Cross-correlation characteristics of OB stars from IUE spectroscopy”, Monthly Notices of the Royal Astronomical Society284 (2): 265-285, Bibcode: 1997MNRAS.284..265H, doi:10.1093/mnras/284.2.265
Morel, T.; et al. (2004-06), “Large-scale wind structures in OB supergiants: a search for rotationally modulated Hα variability”, Monthly Notices of the Royal Astronomical Society351 (2): 552-568, Bibcode: 2004MNRAS.351..552M, doi:10.1111/j.1365-2966.2004.07799.x
Underhill, Anne B. (1961), “Some spectroscopic observations of the supergiants 67 Ophiuchi, 55 Cygni and χ2 Orionis”, Publications of the Dominion Astrophysical Observatory11: 353-361, Bibcode: 1960PDAO...11..353U
ESA (1997), The HIPPARCOS and TYCHO catalogues. Astrometric and photometric star catalogues derived from the ESA HIPPARCOS Space Astrometry Mission, ESA SP Series, 1200, Noordwijk, Netherlands: ESA Publications Division, Bibcode: 1997ESASP1200.....E, ISBN9290923997
Neckel, Th.; Klare, G. (1980-11), “The spatial distribution of the interstellar extinction”, Astronomy & Astrophysics Supplement Series42: 251-281, Bibcode: 1980A&AS...42..251N
Haucke, M.; et al. (2018-06), “Wind properties of variable B supergiants. Evidence of pulsations connected with mass-loss episodes”, Astronomy & Astrophysics614: A91, Bibcode: 2018A&A...614A..91H, doi:10.1051/0004-6361/201731678
Kudritzki, R. P.; et al. (1999-10), “The wind momentum-luminosity relationship of galactic A- and B-supergiants”, Astronomy & Astrophysics350: 970-984, Bibcode: 1999A&A...350..970K
Haucke, M.; et al. (2016-08), “What do we know about mass ejection in B Supergiant Stars?”, Boletín de la Asociación Argentina de Astronomía58: 171-173, Bibcode: 2016BAAA...58..171H
Howarth, Ian D.; et al. (1997-01), “Cross-correlation characteristics of OB stars from IUE spectroscopy”, Monthly Notices of the Royal Astronomical Society284 (2): 265-285, Bibcode: 1997MNRAS.284..265H, doi:10.1093/mnras/284.2.265
Morel, T.; et al. (2004-06), “Large-scale wind structures in OB supergiants: a search for rotationally modulated Hα variability”, Monthly Notices of the Royal Astronomical Society351 (2): 552-568, Bibcode: 2004MNRAS.351..552M, doi:10.1111/j.1365-2966.2004.07799.x
Waelkens, C.; et al. (1998-02), “Study of an unbiased sample of B stars observed with Hipparcos: the discovery of a large amount of new slowly pulsating B stars”, Astronomy & Astrophysics330: 215-221, Bibcode: 1998A&A...330..215W