Kosseva, M. R., N. A. Tjutju, and B. D. Tantra. “ENZYMATIC HYDROLYSIS OF CELLULOSE IN COCONUT COIR: PRETREATED VIA SONICATION”. Proceedings of International Conference on BioScience and Biotechnology, vol. 2, no. 1, Sept. 2017, pp. 65-71, doi:10.17501/biotech.2017.2107.