CHU, Haocheng. Empirical Test of the Impact of R&D Expenditures on the Price-to-Earnings Ratios of Photovoltaic Enterprises. Frontiers in Economics and Management, [S. l.], v. 7, n. 7, p. 230–238, 2026. DOI: 10.6981/FEM.202607_7(7).0022. Disponível em: https://fieam.org/index.php/ojs/article/view/280. Acesso em: 15 jul. 2026.