Chemically Consistent Evolutionary Synthesis
  To account for the range of stellar metallicities in local galaxies and for the increasing importance of low metallicities at higher redshift we present chemically consistent models for the spectral and chemical evolution of galaxies over cosmological timescales. We discuss advantages, limitations and future prospects of our approach. 
Uta Fritze-v. Alvensleben, Peter Weilbacher, Jens Bicker   (Universit\"atssternwarte, G\"ottingen, Germany)