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van Belle, Gerard T.; von Braun, Kaspar (2009). «Directly Determined Linear Radii and Effective Temperatures of Exoplanet Host Stars». The Astrophysical Journal. 694 (2): 1085–1098. Bibcode:2009ApJ...694.1085V. doi:10.1088/0004-637X/694/2/1085.
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Frasca, A.; m.fl. (2009). «REM near-IR and optical photometric monitoring of pre-main sequence stars in Orion. Rotation periods and starspot parameters». Astronomy and Astrophysics. 508 (3): 1313–1330. Bibcode:2009A&A...508.1313F. doi:10.1051/0004-6361/200913327.