PMID 16799623. doi:10.1038/sj.onc.1209558. (原始内容存档于2022-11-14) (英语). Liu, Chao. Possible stem cell origin of human cholangiocarcinoma. World Journal of
ISSN 1088-9051. PMID 23093720. doi:10.1101/gr.136739.111 (英语). Davis, Brigid M; Chao, Michael C; Waldor, Matthew K. Entering the era of bacterial epigenomics