Anoxic events in the Late Cretaceous chalk seas of north-west Europe: Microfossils from recent and fossil shelf seas / editors: J.W. Neale and M.D. Brasier. Chicester: Ellis Horwood, for the British Micropalaeontological Society, 1981 177-185: ill, maps / M.B. Hart and P.J. BiggBooks/Monographs
