RT - Journal Article T1 - P.C JF - jeg YR - 2014 JO - jeg VO - 8 IS - 3 UR - http://jeg.khu.ac.ir/article-1-1929-en.html SP - 1 EP - 8 K1 - 1 AB - 1 LA eng UL http://jeg.khu.ac.ir/article-1-1929-en.html M3 ER -