D.B. Guenther, P. Demarque, D. Buzasi, J. Catanzarite i inni. Evolutionary Model and Oscillation Frequencies for α Ursae Majoris: A Comparison with Observations. „The Astrophysical Journal”. 530 (1), s. L45–L48, 2000. DOI: 10.1086/312473. PMID: 10642202. Bibcode: 2000ApJ...530L..45G. (ang.).
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D.B. Guenther, P. Demarque, D. Buzasi, J. Catanzarite i inni. Evolutionary Model and Oscillation Frequencies for α Ursae Majoris: A Comparison with Observations. „The Astrophysical Journal”. 530 (1), s. L45–L48, 2000. DOI: 10.1086/312473. PMID: 10642202. Bibcode: 2000ApJ...530L..45G. (ang.).
D.B. Guenther, P. Demarque, D. Buzasi, J. Catanzarite i inni. Evolutionary Model and Oscillation Frequencies for α Ursae Majoris: A Comparison with Observations. „The Astrophysical Journal”. 530 (1), s. L45–L48, 2000. DOI: 10.1086/312473. PMID: 10642202. Bibcode: 2000ApJ...530L..45G. (ang.).