Dagbagli, Seval, and Yekta Goksungur. 2008. “Optimization of β-Galactosidase Production Using Kluyveromyces Lactis NRRL Y-8279 by Response Surface Methodology”. Electronic Journal of Biotechnology 11 (4). Valparaíso, Chile:0-0. https://preprints.pucv.cl/index.php/ejbiotechnology/article/view/v11n4-12.