Erbacher, J.; Thurow, J. (1997): Influence of oceanic anoxic events on the evolution of Mid-Cretaceous Radiolaria in the North Atlantic and western Tethys. Elsevier, Amsterdam, Netherlands, In: Takahashi, Kozo (editor), Lazarus, Dave (editor), InterRad VII, 30 (1-3), 139-158, georefid:1997-033371