Gravitational Binding Energy in Charged Cylindrical Symmetry
  We consider static cylindrically symmetric charged gravitating object with perfect fluid and investigate the gravitational binding energy. It is found that only the localized part of the mass function provides the gravitational binding energy, whereas the non-localized part generated by the electric coupling does not contribute for such energy. 
M. Sharif and M. Zaeem Ul Haq Bhatti
gr-qc