King, Jeremy R. m. fl.. (April 2003), «Stellar Kinematic Groups. II. A Reexamination of the Membership, Activity, and Age of the Ursa Major Group», The Astronomical Journal125 (4): 1980–2017, Bibcode2003AJ....125.1980K, DOI:10.1086/368241
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King, Jeremy R. m. fl.. (April 2003), «Stellar Kinematic Groups. II. A Reexamination of the Membership, Activity, and Age of the Ursa Major Group», The Astronomical Journal125 (4): 1980–2017, Bibcode2003AJ....125.1980K, DOI:10.1086/368241