On rotating solitons in general relativity
  We review a number of results recently obtained in the area of constructing rotating solitons in a four dimensional asymptotically flat spacetime. Various models are examined, special attention being paid to the monopole-antimonopole and gauged skyrmion configurations, which have a nonvanishing total angular momentum. For all known examples of rotating solitons, the angular momentum is fixed by some conserved charge of the matter fields. 
Eugen Radu