Gw mau tau Pustaka tambahan dari Papirus Chester Beatty

Banov, L., Jr. (1965). "The Chester Beatty Medical Papyrus: the earliest known treatise completely devoted to anorectal diseases." PubMed.

Viso, L.; Uriach, J. (1995). "The 'Guardians of the anus' and their practice." International Journal of Colorectal Disease, Volume 10, Number 4, October 1995.