http://fa.wikipedia.org/wiki/%D8%A8%D9%87%D8%AF%D8%A7%D8%B4%D8%AA_%D8%B9%D9%85%D9%88%D9%85%DB%8C_%D8%AF%D9%87%D8%A7%D9%86_%D9%88_%D8%AF%D9%86%D8%AF%D8%A7%D9%86
http://fa.parsiteb.com/news.php?nid=10663
http://iec.behdasht.gov.ir/index.aspx?siteid=143&pageid=29433