1. Standard Methods for the Examination of Waters and Wastewater, American Public Health Association, Washington, DC, 16th end, 1986, p. 525
2. Japanese Industrial Standard Committee Testing Methods for Industrial Waste Water, JIS K0102, JIS, Tokyo, Japan, 1993, p. 48
3. Amperometric estimation of BOD by using living immobilized yeasts
4. Disposable sensor for biochemical oxygen demand