8Poland J F. Mechanics of land subsidence due to fluid withdrawal [M]. Guidebook to Studies of Land Subsidence Due to Groundwater Withdrawal, Ed. By J. F. Poland, Book Crafters Press,1984:37-54.
9Poland J F.Guidebook to Studies of Land Subsidence Due to Ground-water Withdrawal[M]. Book Crafters Press, 1984: 8-10.
10Shi L,Bao M. Case history No. 9. 2, Shanghai, China[M].Guidebook to Studies of Land Subsidence Due to Ground-water Withdrawal, Ed. By J. F. Poland, Book Crafters Press, 1984:155-160.
