1. Standard Methods for the Examination of Water and Wastewater,1989
2. Manmade Closed Ecological Systems;Gitelson,2003
3. Soil-like substrate for plant growing derived from inedible plant mass: preparing, composition, fertility;Gros;Acta Hort. (ISHS),2004
4. Zimpro process. Moist air oxidation of industrial sludges;Huesler;Abwassertechnik,1971
5. Kim, T.I., Yoo, Y.H., Jung, J.W., et al., 2007. Method and device for producing liquid fertilizer. Patent No. KR100780430, Republic of Korea.