Lu, Yongzhong, and Xuecheng Zhang. 2005. “The Upstream Sequence of the Phycocyanin β Subunit Gene from Arthrospira Platensis Regulates Expression of Gfp Gene in Response to Light Intensity”. Electronic Journal of Biotechnology 8 (1). Valparaíso, Chile:0-0. https://preprints.pucv.cl/index.php/ejbiotechnology/article/view/v8n1-9.