Calculation of, and bounds for, the multipole moments of stationary   spacetimes
  In this paper the multipole moments of stationary asymptotically flat spacetimes are considered. We show how the tensorial recursion of Geroch and Hansen can be replaced by a scalar recursion on R^2. We also give a bound on the multipole moments. This gives a proof of the "necessary part" of a long standing conjecture due to Geroch. 
Thomas B\"ackdahl, Magnus Herberthson