NIU, Jing; WEN, Jun; YANG, Xiu-Yun; CHANG, Chun-Ping. Trade Openness, Political Stability and Environmental Performance: What Kind of Long-Run Relationship?. Problemy Ekorozwoju, [S. l.], v. 13, n. 2, p. 57–66, 2018. Disponível em: https://ph.pollub.pl/index.php/preko/article/view/5013. Acesso em: 22 jul. 2024.