ZHAO, S.; TIAN, W.; DAGESTANI, A. A. How do R&D factors affect total factor productivity: based on stochastic frontier analysis method. Economic Analysis Letters, [S. l.], v. 1, n. 2, p. 28–34, 2022. DOI: 10.58567/eal01020005. Disponível em: http://anser.press/index.php/eal/article/view/82. Acesso em: 10 mar. 2025.