1. Cheng, G., He, P., Linearity engineering in permafrost areas, Journal of Glaciology and Geocryology (in Chinese), 2001, 23(3): 213–217.
2. Nelson, F. E., Anisimov, O. A., Shiklomanov, N. I., Subsidence risk from thawing permafrost, Nature, 2001, 410, 889–890.
3. Wu, Q., Zhu, Y., Liu, Y., Evaluating model of frozen soil environment change under engineering actions, Science in China, Ser. D, 2002, 45(10): 893–902.
4. Nelson, F. E., Anisimov, O. A., Shiklomanov, N. I., Climate change and hazard zonation in the circum-Arctic permafrost regions, Nature Hazards, 2002, 26: 203–225.
5. Instanes, A., Climate change and possible impact on Arctic infrastructure, in Proceedings of the Eighth International Conference on Permafrost, Vol. 1. ((eds. Phylips, M. et al.), Tokyo: AA Balkema Publishers, 2003, 461–466.