@article{
  author = {Sajadi, Shahla, Cheshmeh Sohrabi, Mozafar},
  title = {Evaluating of the structure of Federated Searching Systems for presentation a  national model},
  journal = {Journal of Knowledge Studies},
  year = {2015},
  volume = {7},
  number = {27},
  pages = {55-72},
  doi = {}
}