To cite this article: Fatima, N., Irfan, M., Shakir, H.A. and Qazi, J.I., 2018. Dilute sulphuric acid pretreatment optimization of cotton stalk for cellulase production through Box-Bhenken design. Punjab Univ. J. Zool., 33(1): 77-85. http:dx.doi.org/10.17582/pujz/2018.33.1.77.85