Rosiana, Nova, and Dwi Asih Surjandari. “The Effect of Hidden Value of Intangible Assets, Investment Opportunity Set, and Environmental Performance on Economic Performance”. Journal of Economics, Finance and Accounting Studies 4, no. 2 (March 31, 2022): 115–125. Accessed August 7, 2025. https://al-kindipublishers.org/index.php/jefas/article/view/3144.