Ansari,A. , and Talebi Najafabadi,A. . "Investigating the Impact of Owner Company Size, Audit Firm Size, and Amount of Non-Audit Fee on Auditor Independence in Conditions of Simultaneous Provision of Audit and Non-Audit Services From Academic and Stock Exchange Viewpoints", Accounting and Auditing Research, 3, 11, 2011, 20-35. doi: 10.22034/iaar.2011.104719