Chinnadurai, K. and Muthukumarappan, K. 2011. Optimizing extrusion pretreatment and big bluestem parameters for enzymatic hydrolysis to produce biofuel using response surface methodology. International Journal of Agricultural and Biological Engineering. 4, 1 (Mar. 2011), 61–74. DOI:https://doi.org/10.25165/ijabe.v4i1.300.