REFERENCES
- Simeonov I., S. Mihajlova, A. Mirkov, I. Petkov, E. Chorukova (2007) Ecological Engineering and Environment Protection, 2, 23–32.
- Saev M., B. Koumanova, I. Simeonov (2009) J. Univ. Chem. Technol. Met. (Sofia), 44, 1,55–60.
- Gómez X., Cuetos M., Cara J., Morán A., García A. (2006) Renewable Energy, 31, 12, 2017–2024.
- Rizk M., Bergamasco R., Tavares C. (2007) Journal of Chemical Reactor Engineering, 5.
- Anhuradha S., Vijayagopal V., Radha P., Ramanujam R. (2007) Clean-Soil, Air, Water, 35, 2, 197–199.
- Dinsdale R., Premier G., Hawkes F., Hawkes D. (2000) Bioresource Technology, 72, 159–168.
- Standard Methods for examination of water and wastewater (1985).16th edn, American Public Health Association, American Water Works Association and Water Pollution Control Federation.
- Ripley, L. E., Boyle, W. C. and Converse, J. C. (1986) J. WPCF 58(5), 406–411.