Ramírez Ruiz, Raúl. “Neto and Giadán: The Last Two Spanish in the Qing Dynasty”. Sinología hispánica. China Studies Review 4, no. 1 (December 13, 2017): 1–46. Accessed September 28, 2022. https://revpubli.unileon.es/index.php/sinologia/article/view/5266.