O’BRIEN, R. Friendship In Troubled Times: The Friendship Of Jan Ruff-O’Herne. The Journal of the Macau Ricci Institute, [S. l.], v. 10, 2023. Disponível em: https://journals.usj.edu.mo/index.php/mrijournal/article/view/94. Acesso em: 22 jan. 2025.