Erkmen and Sarjeant, 1978
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Erkmen, U. and Sarjeant, W.A.S., 1978: Xylochoarion, new genus of dinoflagellate cysts from the Hackness Rock (Middle Jurassic: Callovian) of Yorkshire, England. Neues Jahrbuch für Geologie und Paläontologie, Monatshefte, no.7, p.400-407.