Extremely charged static perfect fluid distributions with dilaton in   curved spacetimes
  We examine charged static perfect fluid distributions with a dilaton field in the frame-work of general relativity. We consider the case that the Einstein equations reduce to a non-linear version of Poisson equation. We show that Maxwell equation and an equation for a dilaton imply the relation among the charge, mass and dilatonic charge densities. 
Yoshinori Cho, Yoshitaka Degura, Kiyoshi Shiraishi (Yamaguchi   University)