Muller, C. (1977): Distribution of calcareous nannoplankton in Oligocene to Holocene sediments of the Red Sea and the Indian Ocean reflecting paleoenvironment. Am. Geophys. Union, Washington, D.C., United States, In: Heirtzler, J. R. (editor), Bolli, H. M. (editor), Davies, T. A. (editor), Saunders, J. B. (editor), Sclater, J. G. (editor), Indian Ocean geology and biostratigraphy; studies following Deep-Sea Drilling legs 22-29, 371-397, georefid:1978-039313