GAO, Yan. Understanding of International Doctoral Students’ Challenges: A Literature Review Study. Journal of International Students, [S. l.], v. 11, n. 2, p. 505–513, 2021. DOI: 10.32674/jis.v11i2.2065. Disponível em: https://ojed.org/jis/article/view/2065. Acesso em: 22 jan. 2025.