Reference

Erna Wirnsberger-Aescht, Wilhelm Foissner, Ilse Foissner (1990): Natural and Cultured Variability of Engelmanniella mobilis (Ciliophora, Hypotrichida); with Notes on the Ultrastructure of its Resting Cyst – Archiv für Protistenkunde – 138_1990: 29 - 49.