Higher order relativistic galaxy number counts: dominating terms
  We review the number counts to second order concentrating on the terms which dominate on sub horizon scales. We re-derive the result for these terms and compare it with the different versions found in the literature. We generalize our derivation to higher order terms, especially the third order number counts which are needed to compute the 1-loop contribution to the power spectrum. 
Jeppe Tr{\o}st Nielsen, Ruth Durrer
astro-ph.CO gr-qc