Jingming Wu and Junqi Yue and Ruikang Hu and Zhaoguang Yang and Lifeng Zhang, Use of Caffeine and Human Pharmaceutical Compounds to Identify Sewage Contamination. journal = {International Journal of Biomedical and Biological Engineering}, [online]. World Academy of Science, Engineering and Technology. August 2008, vol. 20(8). 289 - 293 [viewed 22 September 2024]. Available from: https://publications.waset.org/pdf/8464.