SUWANTO, A., SUMARDI, HENAWIDJAJA, M. T. and URWADARIA, T. R. P. (2011) “ISOLATION AND CHARACTERIZATION OF MANNANOLYTIC THERMOPHILIC BACTERIA FROM PALM OIL SHELL AND THEIR MANNANASE ENZYME PRODUCTION PROPERTIES”, BIOTROPIA - The Southeast Asian Journal of Tropical Biology, (25). doi: 10.11598/btb.2005.0.25.211.