Santoso, Adi, and Arizah Kusumawati. “Optimization Expression and Stability Test of Recombinant Human Interferon Alfa 2a Fusion Protein in Escherichia coli BL21 (DE3)”. Annales Bogorienses, vol. 19, no. 1, June 2015, pp. 1-7, doi:10.14203/ann.bogor.2015.v19.n1.1-8.