1. V., Apostolescu: Ostracodes du Lias du Basin de Paris, Revue Inst. fr. Pétrole, 14, 795-826, 1959.
2. P., Ascoli: Foraminiferal and Ostracod biostratigraphy of the Mesozoic-Cenozoic, Scotian Shelf, Atlantic Canada, 1sr Int. Symp. on benthonic Foraminifera of Continental Margins, 1, 653-771, 1976.
3. I., Bang: Biostratigraphical investigation of the pre-Quartenary in the Oresund Boreholes mainly on the basis of the ForaminiferaIn DanmgeolUnders., Copenhagen, 1, 86–88, pls2–20, 24., 1968.
4. F. T., Banner, M., Brooks and E., Williams: The Geology of the Approaches to Barry, Glamorgan, Proc. Geol. Ass, 82, 231-248, 1971.
5. T., Barnard: Foraminifera from the Lower Lias of the Dorset Coast, Q. Jl. Geol. Sac. Lond, 105, 347-391, 1950.