Houk, Nancy (1978), Michigan catalogue of two-dimensional spectral types for the HD stars, vol. 2, Ann Arbor: Dept. of Astronomy, University of Michigan, Bibcode:1978mcts.book.....H.
Kostjuk, N.D. (2002), "HD-DM-GC-HR-HIP-Bayer-Flamsteed Cross Index", Institute of Astronomy of the Russian Academy of Sciences, Bibcode:2004yCat.4027....0K.