GU, Ailin. A Study on Digital Economic Development Levels Based on the Topsis Comprehensive Evaluation Method: A Case Study of the North China Region. Journal of Innovation and Development, [S. l.], v. 11, n. 3, p. 71–83, 2025. DOI: 10.54097/rx342r37. Disponível em: https://drpress.org/ojs/index.php/jid/article/view/31041. Acesso em: 30 apr. 2026.