Rio, Domenico; Fornaciari, Eliana; Raffi, Isabella (1990): Late Oligocene through early Pleistocene calcareous nannofossils from western equatorial Indian Ocean (Leg 115). In: Duncan, RA; Backmann, J; Peterson, LC; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 115, 175-235, doi:10.2973/odp.proc.sr.115.152.1990