Vergara, Mauricio, Silvana Becerra, Alvaro Diaz-Barrera, Julio Berrios, and Claudia Altamirano. 2012. “Simultaneous Environmental Manipulations in Semi-Perfusion Cultures of CHO Cells Producing Rh-TPA”. Electronic Journal of Biotechnology 15 (6). Valparaíso, Chile. https://www.ejbiotechnology.info/index.php/ejbiotechnology/article/view/v15n6-2.