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Lenton, Timothy M.; Rockström, Johan; Gaffney, Owen; Rahmstorf, Stefan; Richardson, Katherine; Steffen, Will; Schellnhuber, Hans Joachim (2019). “Climate tipping points — too risky to bet against”. Nature (bằng tiếng Anh). 575 (7784): 592–595. doi:10.1038/d41586-019-03595-0. PMID31776487.