Firth, John V (1989): Eocene and Oligocene calcareous nannofossils from the Labrador Sea, ODP Leg 105. In: Srivastava, SP; Arthur, M; Clement, B; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 105, 263-286, doi:10.2973/odp.proc.sr.105.131.1989