C. Regalado, I. Vázquez-Obregón, B. E. García-Almendárez, J. Domínguez-Domínguez, A. Aguilera-Barreyro, and A. Amaro-Reyes, “Xylanolytic enzymes production by Aspergillus niger GS1 from solid-state fermentation on corn stover and their effect on ruminal digestibility”, Electron. J. Biotechnol., vol. 14, no. 2, Mar. 2011.