Egerton, Frank N. (2013). "History of Ecological Sciences, Part 46: From Parasitology to Germ Theory". The Bulletin of the Ecological Society of America. 94 (2): 136–164. Bibcode:2013BuESA..94..136E. doi:10.1890/0012-9623-94.2.136.
Egerton, Frank N. (2013). "History of Ecological Sciences, Part 46: From Parasitology to Germ Theory". The Bulletin of the Ecological Society of America. 94 (2): 136–164. Bibcode:2013BuESA..94..136E. doi:10.1890/0012-9623-94.2.136.
Jordan, Robert C. R. (1855). "On the Entozoa, Especially Those Infesting the Human Subject: Bring the Substance of a Lecture Given at Queen's College". Association Medical Journal. 3 (139): 809–812. JSTOR25496610.