Chua H., Yu P. H. F., Sin S. N., Cheung M. W. L., 1999, Sub-lethal Effects of Heavy Metals on Activated Sludge Microorganisms, Chemosphere, Chua, H., Yu, P. H. F., Sin, S. N., and Cheung, M. W. L. (1999). Sub-lethal Effects of Heavy Metals on Activated Sludge Microorganisms, Chemosphere, 39(15), pp. 2681-2692., Vol. 39, No. 15, pp. 2681-2692

Cimino G., Caristi C., 1990, Acute Toxicity of Heavy Metals to Aerobic Digestion of Waste Cheese Whey, Biological Wastes, Cimino, G. and Caristi, C. (1990). Acute Toxicity of Heavy Metals to Aerobic Digestion of Waste Cheese Whey, Biological Wastes, 33(3), pp. 201-210., Vol. 33, No. 3, pp. 201-210

Cokgor E. U., Ozdemir S., Karahan O., Insel G., Orhon D., 2007, Critical Appraisal of Respirometric Methods for Metal Inhibition on Activated Sludge, Journal of Hazardous Materials, Cokgor, E. U., Ozdemir, S., Karahan, O., Insel, G., and Orhon, D. (2007). Critical Appraisal of Respirometric Methods for Metal Inhibition on Activated Sludge, Journal of Hazardous Materials, B139, pp. 332-339., Vol. B139, pp. 332-339

Dalzell D. J. B., Alte S., Aspichueta E., Sota D. L., Etxebarria J., Gutierrez M., Hoffmann C. C., Sales D., Obst U., Christofi N., 2002, A Comparison of Five Rapid Direct Toxicity Assessment Methods to Determine Toxicity of Pollutants to Activated Sludge, Chemosphere, Dalzell, D. J. B., Alte, S., Aspichueta, E., Sota, D. L., Etxebarria, J., Gutierrez, M., Hoffmann, C. C., Sales, D., Obst, U., and Christofi, N. (2002). A Comparison of Five Rapid Direct Toxicity Assessment Methods to Determine Toxicity of Pollutants to Activated Sludge, Chemosphere, 47(5), pp. 535-545., Vol. 47, No. 5, pp. 535-545

Dhokpande S. R., Kaware J. P., 2013, Biological Methods for Heavy Metal Removal - A Review, International Journal of Engineering Science and Innovative Technology, Dhokpande, S. R. and Kaware, J. P. (2013). Biological Methods for Heavy Metal Removal - A Review, International Journal of Engineering Science and Innovative Technology, 2(5), pp. 304-309., Vol. 2, No. 5, pp. 304-309

El-Bestawy E., Helmy S., Hussein H., Fahmy M., 2013, Optimization and/or Acclimatization of Activated Sludge Process under Heavy Metals Stress, World Journal of Microbiology and Biotechnology, El-Bestawy, E., Helmy, S., Hussein, H., and Fahmy, M. (2013). Optimization and/or Acclimatization of Activated Sludge Process under Heavy Metals Stress, World Journal of Microbiology and Biotechnology, 29(4), pp. 693-705., Vol. 29, No. 4, pp. 693-705

Hartmann S., Skrobankova H., Drozdova J., 2013, Inhibition of Activated Sludge Respiration by Heavy Metals, Hartmann, S., Skrobankova, H., and Drozdova, J. (2013). Inhibition of Activated Sludge Respiration by Heavy Metals, Proceedings of the 2013 International Conference on Environment, Energy, Ecosystem and Development, Italy, September 28-30, pp. 231-235., pp. 231-235

Kim Y. Y., Woo J. S., Hwang S. M., Kim M. J., 2012, Investigation of Eco-toxicological Substances in Banwol Industrial Drainages Using the Regression Analysis, Journal of Korean Society on Water Environment, Kim, Y. Y., Woo, J. S., Hwang, S. M., and Kim, M. J. (2012). Investigation of Eco-toxicological Substances in Banwol Industrial Drainages Using the Regression Analysis, Journal of Korean Society on Water Environment, 28(3), pp. 467-472. [Korean Literature], Vol. 28, No. 3, pp. 467-472

Lin Y. M., Yang X. F., Liu Y., 2003, Kinetic Responses of Activated Sludge Microorganisms to Individual and Joint Copper and Zinc, Journal of Environmental Science and Health, Part A : Toxic/Hazardous Substances and Environmental Engineering, Lin, Y. M., Yang, X. F., and Liu, Y. (2003). Kinetic Responses of Activated Sludge Microorganisms to Individual and Joint Copper and Zinc, Journal of Environmental Science and Health, Part A : Toxic/Hazardous Substances and Environmental Engineering, 38(2), pp. 353-360., Vol. 38, No. 2, pp. 353-360

Madoni P., Davoli D., Guglielmi L., 1999, Response of SOUR and AUR to Heavy Metal Contamination in Activated Sludge, Water Research, Madoni, P., Davoli, D., and Guglielmi, L. (1999). Response of SOUR and AUR to Heavy Metal Contamination in Activated Sludge, Water Research, 33(10), pp. 2459-2464., Vol. 33, No. 10, pp. 2459-2464

Ong S. A., Toorisaka E., Hirata M., Hano T., 2010, Adsorption and Toxicity of Heavy Metals on Activated Sludge, ScienceAsia, Ong, S. A., Toorisaka, E., Hirata, M., and Hano, T. (2010). Adsorption and Toxicity of Heavy Metals on Activated Sludge, ScienceAsia, 36, pp. 204-209., Vol. 36, pp. 204-209

Tsai Y. P., You S. J., Pai T. Y., Chen K. W., 2006, Effect of Cd (II) on Different Bacterial Species Present in a Single Sludge Activated Sludge Process for Carbon and Nutrient Removal, Journal of Environmental Engineering, Tsai, Y. P., You, S. J., Pai, T. Y., and Chen, K. W. (2006). Effect of Cd (II) on Different Bacterial Species Present in a Single Sludge Activated Sludge Process for Carbon and Nutrient Removal, Journal of Environmental Engineering, 132(2), pp. 173-180., Vol. 132, No. 2, pp. 173-180

Yu S. J., Park S. M., Kwon O. S., Park S. J., Yeom I. T., 2013, Improvement on Sewerage Effluent Standard of Public Sewerage Treatment Plants, Journal of Korean Society on Water Environment, Yu, S. J., Park, S. M., Kwon, O. S., Park, S. J., and Yeom, I. T. (2013). Improvement on Sewerage Effluent Standard of Public Sewerage Treatment Plants, Journal of Korean Society on Water Environment, 29(2), pp. 276-287. [Korean Literature], Vol. 29, No. 2, pp. 276-287