未登录Ultra-cool dwarfs: new discoveries, proper motions, and improved spectral typing from SDSS and 2MASS photometric colors
Zhang, Z. H.; Pokorny, R. S.; Jones, H. R. A.; Pinfield, D. J.; Chen, P. S.; Han, Z.; Chen, D.; Galvez-Ortiz, M. C.; Burningham, B.
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