NIU, Kefeng. Historical Distribution of François’ Langurs (Trachypithecus francoisi) in Guangdong, China: Implications for Their Conservation. 浪淘沙预印本平台, 2025. DOI: 10.65215/4rjc2p12. Disponível em: https://www.langtaosha.org.cn/index.php/lts/preprint/view/47. Acesso em: 5 2月. 2026.