Fernandez-Da Silva, Rafael, and Andrea Menéndez-Yuffá. 2003. “Transient Gene Expression in Secondary Somatic Embryos from Coffee Tissues Electroporated With the Genes Gus and Bar”. Electronic Journal of Biotechnology 6 (1). Valparaíso, Chile:0-0. https://www.ejbiotechnology.info/index.php/ejbiotechnology/article/view/v6n1-6.