Nordström, B.; Andersen, J.; Holmberg, J.; Jørgensen, B. R.; và đồng nghiệp (2004). “The Geneva-Copenhagen survey of the Solar neighbourhood. Ages, metallicities, and kinematic properties of ~14000 F and G dwarfs”. Publications of the Astronomical Society of Australia. 21 (2): 129–133. arXiv:0811.3982. Bibcode:2004PASA...21..129N. doi:10.1071/AS04013.
Nordström, B.; Andersen, J.; Holmberg, J.; Jørgensen, B. R.; và đồng nghiệp (2004). “The Geneva-Copenhagen survey of the Solar neighbourhood. Ages, metallicities, and kinematic properties of ~14000 F and G dwarfs”. Publications of the Astronomical Society of Australia. 21 (2): 129–133. arXiv:0811.3982. Bibcode:2004PASA...21..129N. doi:10.1071/AS04013.
Lucy, L. B.; Ricco, E. (tháng 3 năm 1979). “The significance of binaries with nearly identical components”. Astronomical Journal. 84: 401–412. Bibcode:1979AJ.....84..401L. doi:10.1086/112434.
Johnson, H. L.; Iriarte, B.; Mitchell, R. I.; Wisniewskj, W. Z. (1966), “UBVRIJKL photometry of the bright stars”, Communications of the Lunar and Planetary Lab, 4 (3): 99, Bibcode:1966CoLPL...4...99J
Nordström, B.; Andersen, J.; Holmberg, J.; Jørgensen, B. R.; và đồng nghiệp (2004). “The Geneva-Copenhagen survey of the Solar neighbourhood. Ages, metallicities, and kinematic properties of ~14000 F and G dwarfs”. Publications of the Astronomical Society of Australia. 21 (2): 129–133. arXiv:0811.3982. Bibcode:2004PASA...21..129N. doi:10.1071/AS04013.
Batten, A. H. (1967). “Sixth catalogue of the orbital elements of spectroscopic binary systems”. Publications of the Dominion Astrophysical Observatory, Victoria. 13: 119–251. Bibcode:1967PDAO...13..119B.
Lucy, L. B.; Ricco, E. (tháng 3 năm 1979). “The significance of binaries with nearly identical components”. Astronomical Journal. 84: 401–412. Bibcode:1979AJ.....84..401L. doi:10.1086/112434.