@ARTICLE{, author = {}, title = {}, volume = {22}, number = {232}, abstract ={ }, URL = {http://tadbir.imi.ir/article-1-205-fa.html}, eprint = {http://tadbir.imi.ir/article-1-205-fa.}, journal = {TADBIR, A MONTHLY MAGAZINE ON MANAGEMENT}, doi = {}, year = {2011} }