Annisa Indriyani, Nenden Indriyani Anggraeni, Sriwidodo and Iman Permana Maksum 2019. Optimization extracellular secretion of Recombinant Human Epidermal Growth Factor (hEGF) in Escherichia coli BL21 (DE3) pD881-OmpA-hEGF by using Response Surface Method (RSM). International Journal of Research in Pharmaceutical Sciences. 10, 3 (Jul. 2019), 1824–1831.