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@Article{ref1,
  title = {Topological Defects in Twisted Bundles of Two-Dimensionally Ordered Filaments},
  author = {Grason, Gregory M.},
  journal = {Phys. Rev. Lett.},
  volume = {105},
  number = {4},
  pages = {045502},
  numpages = {4},
  year = {2010},
  month = {Jul},
  doi = {10.1103/PhysRevLett.105.045502},
  publisher = {American Physical Society}
}

@Article{ref2,
  title = {ردیابی اتوماتیک ذره در دو بعد},
  author = {محمد چهارسوقی, حمیدرضا خالصی‌فرد},
  journal = {نام جورنال},
  volume = {۱۰۵},
  number = {۴},
  pages = {۰۶۷۴۶},
  numpages = {۴},
  year = {۱۳۸۹},
  month = {آذر},
   publisher = {انجمن فیزیک ایران}
}