Gravity according to theory of sources
  The metric of spherically symmetric ball of ideal liquid is considered in $G^2$- approximation with the help of theory of sources. Using the integral equations of this theory gives the exterior metric depending upon the radius of the ball of matter in some terms proportional to $G^2$..I argue that according this metric from measurement outside the ball one can infer the value of ball radius. 
A.I.Nikishov
physics.gen-ph