Radolf, Justin D. Treponema. ncbi.nlm.nih.gov (University of Texas Medical Branch at Galveston). 1996 [13 February 2019]. ISBN 9780963117212. (原始内容存档于2021-08-17).
Radolf, Justin D. Baron, Samuel , 编. Treponema 4th. Galveston (TX): University of Texas Medical Branch at Galveston. 1996 [2022-02-28]. ISBN 978-0963117212. PMID 21413263. (原始内容存档于2021-08-17).
Radolf, Justin D. Treponema. ncbi.nlm.nih.gov (University of Texas Medical Branch at Galveston). 1996 [13 February 2019]. ISBN 9780963117212. (原始内容存档于2021-08-17).
Radolf, Justin D. Baron, Samuel , 编. Treponema 4th. Galveston (TX): University of Texas Medical Branch at Galveston. 1996 [2022-02-28]. ISBN 978-0963117212. PMID 21413263. (原始内容存档于2021-08-17).