Campbell, Bruce; และคณะ (1988). "A Search for Substellar Companions to Solar-type Stars". The Astrophysical Journal. 331: 902–921. Bibcode:1988ApJ...331..902C. doi:10.1086/166608.
Campbell, Bruce; และคณะ (1988). "A Search for Substellar Companions to Solar-type Stars". The Astrophysical Journal. 331: 902–921. Bibcode:1988ApJ...331..902C. doi:10.1086/166608.