Brinkhuis and Zachariasse, 1988
From dinoflaj3
Brinkhuis, H. and Zachariasse, W.J., 1988: Dinoflagellate cysts, sea level changes and planktonic foraminifers across the Cretaceous-Tertiary boundary at El Haria, northwest Tunisia. Marine Micropaleontology, v.13, p.153-191, pl.1-9.