Heidari, M. , Chaharmahali, A.A. and Matinfard, M. (2024) “Design and Validation of a Native Conceptual Model for Evaluating and Improving Internal Audit Performance in the Iranian Petrochemical Industry Using a Mixed-Methods Approach”, Business, Marketing, and Finance Open, 1(6), pp. 184–195. Available at: https://bmfopen.com/index.php/bmfopen/article/view/359 (Accessed: 5 December 2025).