1. Bastian, U., Roeser, S., et al. 1993, PPM Star Catalogue, Positions and Proper Motion of 197179 Stars South of -2.5 degrees declination for Equinox and Epoch J2000 (Heidelberg, Berlin, New York: Spectrum Akademischer Verlag)
2. ESA 1997, The Hipparcos and Tycho Catalogue, 1200
3. Roeser, S., Bastian, U., et al. 1991, PPM Star Catalogue, Positions and Proper Motion of 181731 Stars North of -2.5 degrees declination for Equinox and Epoch J2000 (Heidelberg, Berlin, New York: Spectrum Akademischer Verlag)