Niu, Kefeng. 《Historical Distribution of François’ Langurs (Trachypithecus Francoisi) in Guangdong, China: Implications for Their Conservation》. 浪淘沙预印本平台, 十二月 25, 2025. 见于 十二月 26, 2025. https://langtaosha.org.cn/index.php/lts/preprint/view/47.