Inhomogeneous space-times and their energy distributions
  This paper also has excessove overlap with the following papers also written by the authors or their collaborators: gr-qc/0502060, gr-qc/0606028, gr-qc/0511095, gr-qc/0505078, gr-qc/0603044, gr-qc/0608014, gr-qc/0510123, gr-qc/0607109, gr-qc/0602012, and others. 
O. Aydogdu, M. Salti, M. Korunur, A. Havare