7Jin H J, Yu Q H, Wang S L, etal. Changes in permafrost en vironments along the Qinghai-Tibet Highway/Railway induced by anthropogenic activities and climate warming[J]. Cold Regions Science and Technology, 2008, 53(3):317-333.
8Jin H J, Wei Z, Wang 5 L, et al. Assessment of frozenground conditions for engineering geology along the Qinghai-Tibet highway and railway, China[J]. Engineering Geology, 2008, 101(3-4):96-109.
9Ling F, Zhang T J. Numerical simulation of permafrost thermal regime and talik development under shallow thaw lakes on the Alaskan Arctic Coastal Plain[J]. Journal of Geophysical Research, 2003, 108(16) :26-36.
10Weeks W F, Fountain A G, Bryan M L, et al. Difference in radar returns from ice-covered North Slope lakes [J]. Journal of Geophysical Research, 1978, 83(C8):4069-4073.