The spectroscopic binary eta Andromedae: Determination of the orbit by optical interferometry, C. A. Hummel et al., Astronomical Journal106, #6 (December 1993), pp. 2486–2492, Bibcode：1993AJ....106.2486H, doi:10.1086/116816.
A list of nine stars whose velocities in the line of sight are variable, W. W. Campbell and W. H. Wright, Astrophysical Journal12 (November 1900), pp. 254–257, Bibcode：1900ApJ....12..254C, doi:10.1086/140765.
harvard.edu
ui.adsabs.harvard.edu
The spectroscopic binary eta Andromedae: Determination of the orbit by optical interferometry, C. A. Hummel et al., Astronomical Journal106, #6 (December 1993), pp. 2486–2492, Bibcode：1993AJ....106.2486H, doi:10.1086/116816.
Table 2, Resolved double-lined spectroscopic binaries: A neglected source of hypothesis-free parallaxes and stellar masses, D. Pourbaix, Astronomy and Astrophysics Supplement145 (August 2000), pp. 215–222, Bibcode：2000A&AS..145..215P.
A list of nine stars whose velocities in the line of sight are variable, W. W. Campbell and W. H. Wright, Astrophysical Journal12 (November 1900), pp. 254–257, Bibcode：1900ApJ....12..254C, doi:10.1086/140765.
The Spectroscopic Binary η Andromedae, Katherine C. Gordon, Astrophysical Journal103 (January 1946), pp. 13–15, Bibcode：1946ApJ...103...13G.
HR 271, database entry, The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version), D. Hoffleit and W. H. Warren, Jr., CDS ID V/50. Accessed on line August 23, 2008.
vizier.u-strasbg.fr
HR 271, database entry, The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version), D. Hoffleit and W. H. Warren, Jr., CDS ID V/50. Accessed on line August 23, 2008.
