Beldarraín Iznaga, A., M. Candelario Frontera, J. Rodríguez Uramis, J. B. Tejera González, Y. Calvo Parra, and Y. Madruga González. “DNA Removal from a Purification Process of Recombinant Hepatitis B Surface Antigen”. Electronic Journal of Biotechnology, vol. 10, no. 1, Jan. 2007, pp. 0-0, https://www.ejbiotechnology.info/index.php/ejbiotechnology/article/view/v10n1-15.