1. Arenou, F. & Luri, X. 1999, in ASP Conf. Ser. 167, Harmonizing Cosmic Distance Scales in a Post-HIPPARCOS Era, ed. D. Egret & A. Heck (San Francisco: ASP), 13
2. HR 2727 : a double-line binary containing a magnetic AP star.
3. ESA. 1997, The Hipparcos and Tycho Catalogues (ESA SP-1200; Noordwijk: ESA)