Rojas-Ayala, Bárbara; Covey, Kevin R.; Muirhead, Philip S.; Lloyd, James P. (Nisan 2012). "Metallicity and Temperature Indicators in M Dwarf K-band Spectra: Testing New and Updated Calibrations with Observations of 133 Solar Neighborhood M Dwarfs". The Astrophysical Journal. 748 (2). s. 93. arXiv:1112.4567 $2. Bibcode:2012ApJ...748...93R. doi:10.1088/0004-637X/748/2/93.
Rojas-Ayala, Bárbara; Covey, Kevin R.; Muirhead, Philip S.; Lloyd, James P. (Nisan 2012). "Metallicity and Temperature Indicators in M Dwarf K-band Spectra: Testing New and Updated Calibrations with Observations of 133 Solar Neighborhood M Dwarfs". The Astrophysical Journal. 748 (2). s. 93. arXiv:1112.4567 $2. Bibcode:2012ApJ...748...93R. doi:10.1088/0004-637X/748/2/93.
Rojas-Ayala, Bárbara; Covey, Kevin R.; Muirhead, Philip S.; Lloyd, James P. (Nisan 2012). "Metallicity and Temperature Indicators in M Dwarf K-band Spectra: Testing New and Updated Calibrations with Observations of 133 Solar Neighborhood M Dwarfs". The Astrophysical Journal. 748 (2). s. 93. arXiv:1112.4567 $2. Bibcode:2012ApJ...748...93R. doi:10.1088/0004-637X/748/2/93.