Wahyudi, W., & Minagawa, M. (2013). The Last 41.000 Years Fluctuation in Atmosperic CO2 Concentration Inferred from The Changes in Oxygen and Carbon Stable Isotopes Ratios of The Marine Sediment. EKSPLORIUM, 33(1), 15–24. https://doi.org/10.17146/eksplorium.2012.33.1.644