Islam, Md Anisul, et al. “Development and Characterization of a Combination Tablet Dosage Form Containing Sofosbuvir and Ribavirin Using Design of Experiments (DoE) Approach”. Dhaka University Journal of Pharmaceutical Sciences, vol. 20, no. 1, June 2021, pp. 121-33, doi:10.3329/dujps.v20i1.54040.