@incollection{gordon1998cluster,
  title={Cluster validation},
  author={Gordon, Allan D},
  booktitle={Data science, classification, and related methods},
  pages={22--39},
  year={1998},
  publisher={Springer}
}


@Book{pasghoheshnameOCR87,
  title =     {پژوهشنامه نویسه‌خوان نوری(OCR) فارسی},
  publisher = {شورای پژوهشی OCR کارگروه خط و زبان فارسی شورای عالی اطلاع رسانی},
  year =      {1387},
  author = {ابراهیمی, افشین and عزمی, رضا and فائز, کریم and قصرساز, ارسلان and کبیر, احسان الله and مظفری, سعید and بین, نیک بین},
  language =  {Persian}
}


@InCollection{pourasad2011farsi,
  author =        {Pourasad, Yaghoub and Hassibi, Houshang and Ghorbani, Azam},
  title =         {Farsi font recognition using holes of letters and horizontal projection profile},
  booktitle =     {Innovative Computing Technology},
  publisher =     {Springer},
  year =          {2011},
  pages =         {235--243},
  __markedentry = {[S.R.P:1]},
  file =          {:D\:\\font thesis\\sources\\survey-ref\\[2011 porasad]farsi font recognition using holes of letters and horizontal projection profile.pdf:PDF}
}