TY - JOUR JF - jsci JO - VL - 1373 IS - 6 PY - 1994 Y1 - 1994/9/01 TI - 5 TT - 5 N2 - 5 SP - 0 EP - 0 AD - KW - 5 UR - http://jsci.khu.ac.ir/article-1-1301-fa.html ER -