Da Silva Paiva, T., & Da Silva-Neto, I. D. (2007).

Morphology and morphogenesis of Strongylidium pseudocrassum Wang and Nie, 1935, with redefinition of Strongylidium Sterki, 1878  (Protista: Ciliophora: Stichotrichia)

. Zootaxa, 1559(1), 31–57. https://doi.org/10.11646/zootaxa.1559.1.2