Roncaglia et al., 1999
From dinoflaj3
Roncaglia, L., Field, B.D., Raine, J.I., Schiøler, P. and Wilson, G.J., 1999: Dinoflagellate biostratigraphy of Piripauan-Haumurian (Upper Cretaceous) sections from the northeast South Island, New Zealand. Cretaceous Research, v.20, p.271-314.