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Casagrande, Luca; Flynn, Chris; Bessell, Michael. M dwarfs: effective temperatures, radii and metallicities. Monthly Notices of the Royal Astronomical Society. September 2008, 389 (2): 585–607. Bibcode:2008MNRAS.389..585C. doi:10.1111/j.1365-2966.2008.13573.x.
Woitas, J.; Leinert, Ch.; Jahreiß, H.; Henry, T.; Franz, O. G.; Wasserman, L. H. The nearby M-dwarf system Gliese 866 revisited. Astronomy and Astrophysics. January 2000, 353: 253–256. Bibcode:2000A&A...353..253W. arXiv:astro-ph/9910411.