• The metallicity versus luminosity relationship for early-type galaxies 

      Bica, Eduardo Luiz Damiani; Alloin, Danielle Marie (1987) [Artigo de periódico]
      In the equivalent width (W) vs absolute magnitude (Mʙ) diagram corresponding to the best metallic features in the visible range, CN and Mg + MgH, field giant E and S0 galaxies are shifted towards weaker line-strengths with ...