1. Adouani N. Study of N2O emissions during biological denitrification of wastewaters. PhD thesis. France: Université de Bretagne-Sud, Pontivy; 2008. 171 p.
2. Factors affecting nitrogen transformations and related nitrous oxide emissions from aerobically treated piggery slurry;Béline;Journal of Agricultural Engineering Research,1999
3. Béline F. Factors affecting Nitrogen Transformations and related Nitrous oxide emissions from aerobically treated piggery slurry. CEMAGREF editions. France; 2001, p. 134.
4. Role of organic matter in volatilisation of sulphur and nitrogen from soils;Bremmer,1977
5. Utilization patterns of volatile fatty acids in the denitrification reaction;Elefsiniotis;Enzyme and Microbial Technology,2007