Johnson, H. L.; Mitchell, R. I.; Iriarte, B.; Wisniewski, W. Z. (1966). "Ubvrijkl Photometry of the Bright Stars". Communications of the Lunar and Planetary Laboratory. 4: 99. Bibcode:1966CoLPL...4...99J.
Bernacca, P. L.; Perinotto, M. (1970). "A catalogue of stellar rotational velocities: I. Main sequence single stars. II. Main sequence spectroscopic binaries and eclipsing systems". Contrib. Os. Astrofis. Asiago. 239: 1. Bibcode:1970CoAsi.239....1B.
Samus, N. N.; Durlevich, O. V.; et al. (2009). "VizieR Online Data Catalog: General Catalogue of Variable Stars (Samus+ 2007-2013)". VizieR On-line Data Catalog: B/GCVS. Originally Published in: 2009yCat....102025S. 1: B/gcvs. Bibcode:2009yCat....102025S.