Boomer, Ian; Ballent, Sara (1996): Early-Middle Jurassic ostracod migration between the Northern and Southern hemispheres; further evidence for a proto Atlantic-Central America connection. Elsevier, Amsterdam, Netherlands, Palaeogeography, Palaeoclimatology, Palaeoecology, 121 (1-2), 53-64, georefid:1996-039764