Pangsri, P., T. Wuttipornpun, and W. Songserm. “Mannanase and Cellulase Enzyme Production from the Agricultural Wastes by the Bacillus Subtilis P2-5 Strain”. Applied Science and Engineering Progress, vol. 14, no. 3, July 2021, pp. 425-34, doi:10.14416/j.asep.2020.05.002.