An atlas of spectra of B6–A2 hypergiants and supergiants from 4800 to 6700 ÅE. L. Chentsov, S. V. Ermakov, V. G. Klochkova, V. E. Panchuk, K. S. Bjorkman and A. S. MiroshnichenkoA&A, 397 3 (2003) 1035-1042DOI: https://doi.org/10.1051/0004-6361:20021430
