A. Baharuddin, N. Rahman, U. Shan, M. Hassan, M. Wakisaka, and Y. Shirai, “Evaluation of pressed shredded empty fruit bunch (EFB)-palm oil mill effluent (POME) anaerobic sludge based compost using Fourier transform infrared (FTIR) and nuclear magnetic resonance (NMR) analysis”, ajb, vol. 10, no. 41, pp. 8082–8289, Oct. 2013.