Smith, M. A. (April 1974), «Metallicism in border regions of the Am domain. III. Analysis of the hot stars Alfa Geminorum A and B and Theta Leonis», Astrophysical Journal189: 101–111, Bibcode:1974ApJ...189..101S, doi:10.1086/152776
Smith, M. A. (April 1974), «Metallicism in border regions of the Am domain. III. Analysis of the hot stars Alfa Geminorum A and B and Theta Leonis», Astrophysical Journal189: 101–111, Bibcode:1974ApJ...189..101S, doi:10.1086/152776