Tasnim, C. A. M., and E. Wuryani. “The Effect of Investment Opportunity Set and Firm Size on Firm Value: Study on Companies Registered in Jakarta Islamic Index Year 2017-2020, Indonesia”. The International Journal of Business & Management, vol. 9, no. 5, May 2021, doi:10.24940/theijbm/2021/v9/i5/BM2105-075.