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Takeda, Genya; et al. Structure and Evolution of Nearby Stars with Planets. II. Physical Properties of ~1000 Cool Stars from the SPOCS Catalog. The Astrophysical Journal Supplement Series. 2007, 168 (2): 297–318. Bibcode:2007ApJS..168..297T. arXiv:astro-ph/0607235. doi:10.1086/509763.
Valenti, J. A.; Fischer, D. A. Spectroscopic Properties of Cool Stars (SPOCS). I. 1040 F, G, and K Dwarfs from Keck, Lick, and AAT Planet Search Programs. The Astrophysical Journal Supplement Series. 2005, 159 (1): 141–166. Bibcode:2005ApJS..159..141V. doi:10.1086/430500.