1. Urban water demand management and planning;Baumann,1998
2. Beijing Statistics Bureau (BSB) (1992). 1991 Beijing statistical yearbook (BSY) (in Chinese). Beijing: The Statistics Publisher of China.
3. Beijing Statistics Bureau (BSB) (1995). 1994 Beijing statistical yearbook (BSY) (in Chinese). Beijing: The Statistics Publisher of China.
4. Beijing Statistics Bureau (BSB) (1999). 1998 Beijing statistical yearbook (BSY) (in Chinese). Beijing: The Statistics Publisher of China.
5. The inelastic demand for residential water;Camp;Journal of American Water Works Association,1978