Xu, K.; Agatha, S.; Dolan, J. (2024). World Ciliophora Database. Pseudovorticella difficilis (Kahl, 1933) Jankowski, 1976. Accessed through: World Register of Marine Species at: https://www.marinespecies.org/aphia.php?p=taxdetails&id=426936 on 2024-08-23
basis of recordLiu, J.Y. [Ruiyu] (ed.). (2008). Checklist of marine biota of China seas. <em>China Science Press.</em> 1267 pp. (look up in IMIS) [details] Available for editors [request]