1. Aubry M-P (1990) Handbook of Cenozoic calcareous nannoplankton. Book 4: Heliolithae (Helicoliths, Cribriliths, Lopadoliths and others). Micropaleontology Press, American Museum of Natural History, New York
2. Black M, Barnes B (1961) Coccoliths and discoasters from the floor of the South Atlantic ocean. J R Microsc Soc 80: 137–147
3. Bown PR, Young JR (1997) Mesozoic Calcareous Nannoplankton classification. J Nannoplankton Res 19: 21–36
4. Clocchiatti M (1969) Contribution à l’étude de Helicosphaera carteri (Wallich) Kamptner (Coccolithophoridae). Revue de Micropaléontologie 12: 75–83
5. Cros L, Fortuno J-M (2002) Atlas of northwestern Mediterranean coccolithophores. Scientia Marina 66 (suppl. 1): 7–182