@article{
  author = {Amini, Payan, Rasti bozorgi, MOrteza, Asghari, Keyvan},
  title = {Advanced Searching of Patent Documents },
  journal = { Roshd -e- Fanavari},
  year = {2009},
  volume = {5},
  number = {20},
  pages = {1-10},
  doi = {}
}