1. Cytologische und genetische Untersuchungen an dem Ciliaten Stylonychia mytilus Ehrenberg;Ammermann;Arch. Protistenk.,1965
2. Characterization of two sibling species of the genus Stylonychia (Ciliata, Hypotricha): S. mytilus Ehrenberg, 1838 and S. lemnae n. sp. I. Morphology and reproductive behavior;Ammermann;J. Protozool.,1983
3. The development of the macronucleus in the ciliated protozoan Stylonychia mytilus;Ammermann;Chromosoma,1974
4. North American and Eurasian strains of Stylonychia lemnae (Ciliophora, Hypotrichida) have a high genetic identity, but differ in the nuclear apparatus and in their mating behavior;Ammermann;Eur. J. Protistol.,1989
5. Monograph of the Oxytrichidae (Ciliophora, Hypotrichia);Berger,1999