Laurinciana, Laurinciana, et al. “CO2 Emissions As the Effect of Land Use and Land-Use Change into Palm Oil Plantation”. International Journal of Sciences: Basic and Applied Research (IJSBAR), vol. 24, no. 2, Sept. 2015, pp. 314-26, https://www.gssrr.org/JournalOfBasicAndApplied/article/view/4470.