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Panichnumsin, P. , Ahring, B. , Nopharatana, A. , Chaipresert, P.. "Comparative Performance and Microbial Community of Single-phase and Two-phase Anaerobic Systems Co-Digesting Cassava Pulpand Pig Manure". World Academy of Science, Engineering and Technology, Open Science Index 38, International Journal of Agricultural and Biosystems Engineering, (2010), 4(2), 162 - 167.