Kuntanoo, K. , Promkotra, S. , Kaewkannetra, P. (2013), 'Biodegradation of Polyhydroxybutyrate-Co- Hydroxyvalerate (PHBV) Blended with Natural Rubber in Soil Environment', World Academy of Science, Engineering and Technology, Open Science Index 84, International Journal of Materials and Metallurgical Engineering, 7(12), 1057 - 1061.