Reference

Gregorio D. Fernandez-Leborans [Fernández-Leborans], Mercedes C. Zaldumbide (1983): Ghlorella sp. (Chlorophyta) Endosymbiotic of Stentor coeruleus (Protozoa, Ciliophora) – Archiv für Protistenkunde – 127_1983: 193 - 200.