Quaijtaal and Brinkhuis, 2012
From dinoflaj3
Quaijtaal, W. and Brinkhuis, H., 2012: Pentadinium alabamensis: A new, unusual dinoflagellate from the Oligocene of the Gulf Coast, Alabama, USA. Review of Palaeobotany and Palynology, v.175, p.47-54, pl.1-2.