Template:Keilin, 1921
- Keilin, D. 1921. On the life history of Helicosporidium parasiticum n.g., n.sp., a new species of protist parasite in the larvae of Dasyhelea obscura Winn. (Diptera: Ceratopogonidae) and in some other arthropods. Parasitology 13(2): 97–113. DOI: 10.1017/S003118200001235X.