ZHANG, Y. . Research on Language Maintenance in China: A CNKI-based Analysis of Mapping Knowledge. European Journal of Behavioral Sciences, [S. l.], v. 5, n. 1, p. 32–40, 2022. DOI: 10.33422/ejbs.v5i1.810. Disponível em: https://www.dpublication.com/journal/EJBS/article/view/810. Acesso em: 8 oct. 2025.