Muzakhar, Kahar, 		S, Sutoyo, AND 		S, Siswoyo.
" SUGAR PRODUCTION BY DIGESTING OF OIL PALM EMPTY FRUIT BUNCH USING EXTRACELLULAR ENZYMES FROM Aspergillus niger AND Trichoderma reesei FOR ETHANOL PRODUCTION" <em>International Journal of Biosciences and Biotechnology</em> [Online], Volume 2 Number 1 (23 December 2014)