Pollack, H. N.; Huang, S.; Shen, P. Y. (2000). "Temperature trends over the past five centuries reconstructed from borehole temperatures". Nature. 403 (6771): 756–758. doi:10.1038/35001556. PMID10693801.
Pollack, H. N.; Huang, S.; Shen, P. Y. (2000). "Temperature trends over the past five centuries reconstructed from borehole temperatures". Nature. 403 (6771): 756–758. doi:10.1038/35001556. PMID10693801.