1. Standard Methods for the Examination of Waters and Wastewater,1986
2. Biosensors for environmental monitoring;Riedel,2000
3. Microbial electrode BOD sensor;Karube;Biotechnol. Bioeng.,1977
4. Trends in bioelectronics research;Karube;Sci. Technol. Jpn.,1986
5. Application of biosensors to environmental samples;Riedel,1998