Heard, John F. (March 1949), "An Analysis of Radial-Velocity Measures of Eight Stars Formerly Assigned to the Beta Cephei Group.", Astrophysical Journal, 109: 185, Bibcode:1949ApJ...109..185H, doi:10.1086/145122.
Heard, John F. (March 1949), "An Analysis of Radial-Velocity Measures of Eight Stars Formerly Assigned to the Beta Cephei Group.", Astrophysical Journal, 109: 185, Bibcode:1949ApJ...109..185H, doi:10.1086/145122.