Non-Standard Big Bang Nucleosynthesis Scenarios
  A brief overview of non-standard big bang nucleosynthesis (BBN) scenarios is presented. Trends and results of the light-element nucleosynthesis in BBN scenarios with small-scale or large-scale inhomogeneity, the presence of antimatter domains, stable or unstable massive neutrinos, neutrino oscillations, neutrino degeneracy, or massive decaying particles are summarized. 
Karsten Jedamzik (Max-Planck Institut f. Astrophysik, Garching,   Germany)