Ghoni, Abdul, and Erny Arianty. “The Impact of Spin-off Policy on the Efficiency of Sharia Insurance in Indonesia Using DEA Approach”. Journal of Islamic Economics Lariba 7, no. 1 (December 8, 2021): 47–66. Accessed November 21, 2024. https://journal.uii.ac.id/JIELariba/article/view/19610.