Houben et al., 2011
From dinoflaj3
Houben, A.J.P., Bijl, P.K., Guerstein, G.R., Sluijs, A, Brinkhuis, H., 2011: Malvinia escutiana, a new biostratigraphically important Oligocene dinoflagellate cyst from the Southern Ocean. Review of Palaeobotany and Palynology, v.165, p.175-182, pl.1-2.