Septisetyani, Endah Puji, et al. “Optimizaton of Cationic Lipid Mediated Transfection of PEGFP-C1 and PJ-EPO Plasmids in Chinese Hamster Ovary (CHO) Cells Attached Culture for Transient and Stable Recombinant Human Erythropoietin (rhEPO) Expression”. Annales Bogorienses, vol. 19, no. 1, June 2015, pp. 9-15, doi:10.14203/ann.bogor.2015.v19.n1.9-16.