1. Standard Methods for the Examination of Water and Wastewater;APHA,1998
2. Manure Management: Treatment Strategies for Sustainable Agriculture;Burton,2003
3. Effectiveness of liquid–solid separation for treatment of flushed dairy manure: a case study;Chastain;Appl. Eng. Agric.,2001
4. Processing manure: physical, chemical and biological treatment;Day,2002
5. Applied Regression Analyses;Draper,1981