Gupta, Anil K.; Sundar Raj, M.; Mohan, K.; De, Soma (2008): A major change in monsoon-driven productivity in the tropical Indian Ocean during ca 1.2-0.9 Myr; foraminiferal faunal and stable isotope data. Elsevier, Amsterdam, Netherlands, Palaeogeography, Palaeoclimatology, Palaeoecology, 261 (3-4), 234-245, georefid:2008-094266