Harrington, David; Koenigsberger, Gloria; Moreno, Edmundo; Kuhn, Jeffrey (October 2009). «Line-profile Variability from Tidal Flows in Alfa Virginis (Spica)». The Astrophysical Journal704 (1): 813–830. Bibcode:2009ApJ...704..813H. arXiv:0908.3336. doi:10.1088/0004-637X/704/1/813.
Gies, Douglas R.; Bagnuolo, William G. jr.; Penny, Laura R. (April 1997). «Photospheric Heating in Colliding-Wind Binaries». Astrophysical Journal479: 408. Bibcode:1997ApJ...479..408G. doi:10.1086/303848.
Wilson, Ralph Elmer (1953). General Catalogue of Stellar Radial Velocities. Washington: Carnegie Institution of Washington. Bibcode:1953QB901.W495.....Check |bibcode= value (hjelp).
Gies, Douglas R.; Bagnuolo, William G. jr.; Penny, Laura R. (April 1997). «Photospheric Heating in Colliding-Wind Binaries». Astrophysical Journal479: 408. Bibcode:1997ApJ...479..408G. doi:10.1086/303848.