1. Arkell, W.J., The Jurassic System in Great Britain, Oxford: Clarendon press, 1933.
2. Arkell, W.J., Jurassic Geology of the World. Edinburgh, London: Oliver&Boyd, 1956.
3. Bather, F., Biological Classification: Past and Future, Proc. Geol. Soc, 1927, vol. LXXXIII, pp. lxii–civ.
4. Biostratigraphie du Jurassique Ouest-Européen et Méditerranéen: zonation paralleles et distribution des invertebres et microfossiles, Bull. Centre, Rech. Elf Explor. Prod., 1997, Mem. 17.
5. Buckman, S.S., The Bajocian of the Sherborne District: Its Relation to Subjacent and Superjacent Strata, Quarterly J. Geol. Soc., 1893, vol. 49, pp. 479–522.