TY - JOUR JF - IJMSI JO - IJMSI VL - 1 IS - 1 PY - 2006 Y1 - 2006/5/01 TI - Groups in Polygroups TT - N2 - SP - 25 EP - 31 AU - Davvaz, B AD - UR - http://ijmsi.ir/article-1-30-en.html DO - 10.7508/ijmsi.2006.01.003 ER -