Natali, Susan M, Jennifer D Watts, Brendan M Rogers, Stefano Potter, Sarah M Ludwig, Anne-Katrin Selbmann, Patrick F Sullivan, et al.. “Large Loss Of Co2 In Winter Observed Across The Northern Permafrost Region”. Nature Climate Change 9. Nature Climate Change (2019): 852–857. doi:10.1038/s41558-019-0592-8.