Schiøler et al., 1997
From dinoflaj2
Schiøler, P., Brinkhuis, H., Roncaglia, L. and Wilson, G.J., 1997: Dinoflagellate biostratigraphy and sequence stratigraphy of the type Maastrichtian (Upper Cretaceous), ENCI Quarry, The Netherlands. Marine Micropaleontology, v.31, p.65-95, pl.1-4.
