1. Visual multiples. VII - MK classifications
2. Claria, J. J. & Lapasset, E. 1981, Inf. Bull. Variable Stars, No. 2035
3. Duerbeck, H. W. 1997, Inf. Bull. Variable Stars, No. 4513
4. ESA. 1997, The Hipparcos and Tycho Catalogues (ESA SP-1200) (Noordwijk: ESA) (HIP)