CHEN, Xiaoqian. Research on the Input-output Efficiency of Tourism Industry in Anhui Province based on DEA Model. International Journal of Education and Humanities, [S. l.], v. 5, n. 2, p. 234–237, 2022. DOI: 10.54097/ijeh.v5i2.2147. Disponível em: https://drpress.org/ojs/index.php/ijeh/article/view/2147. Acesso em: 17 apr. 2026.