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Anglada-Escudé, G.; Tuomi, M.; Arriagada, P.; Zechmeister, M.; Jenkins, J. S.; Ofir, A.; Dreizler, S.; Gerlach, E. et al. (2016). “NO EVIDENCE FOR ACTIVITY CORRELATIONS IN THE RADIAL VELOCITIES OF KAPTEYN’S STAR”. The Astrophysical Journal830 (2): 74. arXiv:1506.09072. doi:10.3847/0004-637X/830/2/74. ISSN1538-4357.