Pincemin et al., 1981
From dinoflaj3
Pincemin, J.M., Gayol, P. and Salvano, P., 1981: Observations on the thecate stage of the dinoflagellate Pyrocystis cf. fusiformis (clones NOB2 and 111): variations in morphology and tabulation. Archiv für Protistenkunde, 124, p.271-282.