Ngo, Tran, Tien Le, and Yen Tran. 2021. “Innovation and Firm Performance: Is R&D Worth It? An Empirical Case of Vietnam Enterprises”. Science & Technology Development Journal: Economics- Law & Management 6 (1), 2039-50. https://doi.org/https://doi.org/10.32508/stdjelm.v6i1.790.