Sales, Marilia Ribeiro, et al. “Variables That Influence the Production of Cellulases and Xylanase by <i>Aspergillus< i> Species”. Pesquisa Agropecuaria Brasileira, vol. 45, no. 11, Jan. 2011, pp. 1290-6, doi:10.1590/S1678-3921.pab2010.v45.8583.