Kim G-S, Kim G-I, Rim G-N, Jang S-N. Methods for Comprehensive Analysis of the Economic Effectiveness of Business Activities: Special Reference to R & D Expenditure. bpr [Internet]. 2021 Jan. 12 [cited 2024 Dec. 4];3(1):1-14. Available from: https://riiopenjournals.com/index.php/business-perspective-review/article/view/224