Relations between three formalisms for irrotational binary neutron stars   in general relativity
  Various formalisms proposed recently for irrotational binary systems in general relativity are compared and explicit relations between them are exhibited. It is notably shown that the formalisms of (i) Teukolsky, (ii) Shibata and (iii) Bonazzola et al. (as corrected by Asada) are equivalent, i.e. yield exactly the same solution, although the former two are simpler than the latter one. 
Eric Gourgoulhon (DARC, CNRS, Observatoire de Paris, France)