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2. The distribution and significance of trace fossils in the uppermost Jurassic rocks of the Boulonnais Northern France;Ager,1970
3. The stratigraphy and facies associations of trace fossils in some Cambrian and Ordovician rocks of North Western Spain;Baldwin,1977
4. Trace fossils of the bioturbate sandstone facies of the Eze-Aku Formation, Nigeria;Banergee;Ind. J. Earth Sci.,1982
5. Bathymetric zonation of Jurassic trace fossils from the Coast of Yorkshire, England;Farrow;Palaeogeogr. Palaeoclimatol. Palaeoecol.,1966