1. Cheng Qiansheng,The Mathematical Principle of Digital Data Processing, Beijing: Petroleum Industry Press, 1979.
2. Bath, M.,Spectral Analysis in Geophysias, Amsterdam: Elsevier Scientific Publishing Company, 1974.
3. Wang Shiyi,Digital Signal Processing, Beijing: Beijing Institute of Technology Press, 1987.
4. Chai Yufu, Algorithm investigation of DFT of potential field (in both Chinese and English),Acta Geophysica Sinica, 1988 31(2): 211.
5. Chai Yufu, Hinze, W. J., Gravity inversion of an interface above which the density contrast varies exponentially with depth,Geophysics, 1988, 53(6): 837.