@article{
  author = {Sedighi, A. R., Sayaf, M., Taban, M. R.},
  title = {Improving the Power System State Estimation Algorithm Based on the PMUs Placement and Voltage Angle Relationships},
  journal = {Nashriyyah -i Muhandisi -i Barq va Muhandisi -i Kampyutar -i Iran},
  year = {2018},
  volume = {16},
  number = {2},
  pages = {135-141},
  doi = {}
}