1. Changlong Hu: Plants and the indoor air purification, Beijing, Mechanical industry Press (1992), in Chinese.
2. Dai Yuan: The family environmental protection guide, Nanjing, Jiangsu Scientific technology press (2003), in Chinese.
3. Tianle Zhu: Indoor air pollution control, Bejing, Chemical industry press (2003), in Chinese.
4. Zhongping Zhou, Shoutang Zhao: Indoor pollution detection and control , Bejing, Chemical industry press (2003), in Chinese.
5. The standardization on Indoor Air Quality of Civil Buildings, the People's Republic of China national standard GB50325-(2001).