(en) Nancy Houk, Michigan catalogue of two-dimensional spectral types for the HD stars : Declinations -53 to -40 degrees, vol. 2, Ann Arbor, Michigan, États-Unis, Département d'astronomie de l'université du Michigan, (Bibcode1978mcts.book.....H)
(en) A. W. J. Cousins, « UBV photometry of E region standard stars of intermediate brightness », South African Astronomical Observatory Circular, vol. 7, , p. 36–46 (Bibcode1983SAAOC...7...36C)