RT - Journal Article T1 - Extended Abstract JF - serd YR - 2016 JO - serd VO - 5 IS - 15 UR - http://serd.khu.ac.ir/article-1-2867-fa.html SP - 221 EP - 242 AB - LA eng UL http://serd.khu.ac.ir/article-1-2867-fa.html M3 ER -