On the Gravitational Energy Associated with Spacetimes of Diagonal   Metric
  This paper also has excessive overlap with the following papers also written by the authors or their collaborators: gr-qc/0608014, gr-qc/0511095, gr-qc/0505078, gr-qc/0502060, gr-qc/0603027, gr-qc/0606028, gr-qc/0607109, gr-qc/0607110, gr-qc/0508018, gr-qc/0502031, and others. 
Murat Korunur, Ali Havare, Mustafa Salti