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Savin, Samuel, Linda Abel, Enriqueta Barrera, David Hodell, James Kennett, Margaret Murphy, Gerta Keller, John Killingley, and Edith Vincent. 1985. “The Evolution of Miocene Surface and Near-Surface Marine Temperatures: Oxygen Isotopic Evidence”. In Geological Society of America Memoirs, 49–82. Geological Society of America. doi:10.1130/mem163-p49.

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Barrera, Enriqueta, Gerta Keller, and Samuel Savin. 1985. “Evolution of the Miocene Ocean in the Eastern North Pacific As Inferred from Oxygen and Carbon Isotopic Ratios of Foraminifera”. In Geological Society of America Memoirs, 83–102. Geological Society of America. doi:10.1130/mem163-p83.