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Cheng, Guodong; Wu (8 June 2007). "Responses of permafrost to climate change and their environmental significance, Qinghai-Tibet Plateau". Journal of Geophysical Research. 112 (F2): F02S03. Bibcode:2007JGRF..112.2S03C. doi:10.1029/2006JF000631. S2CID14450823.
Cheng, Guodong; Wu (8 June 2007). "Responses of permafrost to climate change and their environmental significance, Qinghai-Tibet Plateau". Journal of Geophysical Research. 112 (F2): F02S03. Bibcode:2007JGRF..112.2S03C. doi:10.1029/2006JF000631. S2CID14450823.