Li, J., S. Wei, C. Cao, K. Chen, H. He, and G. Gao. “Retrovectors Packaged in CHO Cells to Generate GLP-1-Fc Stable Expression CHO Cell Lines”. Electronic Journal of Biotechnology, vol. 41, Sept. 2019, https://www.ejbiotechnology.info/index.php/ejbiotechnology/article/view/2019.07.002.