Guo, Z. T.; Ruddiman, W. F.; Hao, Q. Z.; Wu, H. B.; Qiao, Y. S.; Zhu, R. X.; Peng, S. Z.; Wei, J. J.; Yuan, B. Y.; Liu, T. S. (2002). "Onset of Asian desertification by 22 Myr ago inferred from loess deposits in China". Nature. 416 (6877): 159–63. Bibcode:2002Natur.416..159G. doi:10.1038/416159a. PMID11894089. S2CID4386917.
Guo, Z. T.; Ruddiman, W. F.; Hao, Q. Z.; Wu, H. B.; Qiao, Y. S.; Zhu, R. X.; Peng, S. Z.; Wei, J. J.; Yuan, B. Y.; Liu, T. S. (2002). "Onset of Asian desertification by 22 Myr ago inferred from loess deposits in China". Nature. 416 (6877): 159–63. Bibcode:2002Natur.416..159G. doi:10.1038/416159a. PMID11894089. S2CID4386917.
Guo, Z. T.; Ruddiman, W. F.; Hao, Q. Z.; Wu, H. B.; Qiao, Y. S.; Zhu, R. X.; Peng, S. Z.; Wei, J. J.; Yuan, B. Y.; Liu, T. S. (2002). "Onset of Asian desertification by 22 Myr ago inferred from loess deposits in China". Nature. 416 (6877): 159–63. Bibcode:2002Natur.416..159G. doi:10.1038/416159a. PMID11894089. S2CID4386917.
Guo, Z. T.; Ruddiman, W. F.; Hao, Q. Z.; Wu, H. B.; Qiao, Y. S.; Zhu, R. X.; Peng, S. Z.; Wei, J. J.; Yuan, B. Y.; Liu, T. S. (2002). "Onset of Asian desertification by 22 Myr ago inferred from loess deposits in China". Nature. 416 (6877): 159–63. Bibcode:2002Natur.416..159G. doi:10.1038/416159a. PMID11894089. S2CID4386917.