KEETON, W.T. and J. GOULD. Biological Science. New York: W. W. Norton & Company, Inc., 1989. ISBN 978-0393953886 .
ASHBY, M. F. Materials and the environment: eco-informed material choice. 2nd ed. Waltham: Elsevier Butterworth-Heinemann, 2013. ISBN 978-0-12-385971-6.
KARAGIANNIDIS, A. Waste to Energy. London: Springer-Verlag, 2012. ISBN 978-1-4471-2306-4
RAO, S.R. Resource recovery and recycling from metallurgical wastes. Amsterdam: Elsevier, 2006. ISBN 0-08-045131-4.
SUTHAR, S. Recycling of agro-industrial sludge through vermitechnolog. Ecological Engineering. 2010, 36 (8), 1028-1036. ISSN 0925-8574 .