List of Articles امنیت در معاملات Open Access Article Abstract Page Full-Text 1 - Estoppel Rule and Security in Transactions and Legal Relations Mohammad Feiz Seyed Pedram Khandani 10.30495/jisds.2007.21291 Open Access Article Abstract Page Full-Text 2 - Estoppel Rule and Security in Transactions and Legal Relations Mohammad Feiz Seyed Pedram Khandani