2014). "Planetary companions in K giants β Cancri, μ Leonis, and β UrsaeMinoris*". arXiv:1405.2127v1 [astro-ph.EP]。 ^ a b c d 輝星星表第5版 ^ Jim Kaler (2013年12月20日)
Year: 366 Nights in the Universe. p. 283 ^ Kaler, James B., “KOCHAB (BetaUrsaeMinoris)”, Stars (University of Illinois), http://stars.astro.illinois.edu/sow/kochab