1. Zheng GD, Gao D, Chen TB, Luo W (2007) Stabilization of nickel and chromium in sewage sludge during aerobic composting. J Hazard Mater 142:216–221
2. Haug RT (1980) Compost engineering principle and practice. Ann Arbor Publisher, Inc, Michigan
3. Haug RT (1993) The practical handbook of compost engineering. Lewis Publishers, Boca Raton, F1.717 pp
4. Hughes EG (1980) The composting of municipal wastes. In: Berwick MM (ed) Handbook of organic wastes conversion, Van Nostrand Reinhold, New York
5. Bertoldi M, Vallini G, Pera A, Zucconi F (1985) Technological aspects of composting including modeling and microbiology. In: Gesser JKR (ed) Composting of agricultural and other wastes, Elsevier Applied Science Publishers, London, p 320