He, Dandan. “RESEARCH ON THE IMPACT OF R&D INVESTMENT ON THE FINANCIAL PERFORMANCE OF THE SECURITY INDUSTRY: A CASE STUDY OF DAHUA COMPANY AND HIKVISION”. Journal of Buddhist Education and Research 7, no. 2 (August 31, 2021): 269–275. Accessed March 29, 2024. https://so06.tci-thaijo.org/index.php/jber/article/view/251109.