Hoenemann, C., and A. Hohe. “Selection of Reference Genes for Normalization of Quantitative Real-Time PCR in Cell Cultures of Cyclamen Persicum”. Electronic Journal of Biotechnology, vol. 14, no. 1, Jan. 2011, https://www.ejbiotechnology.info/index.php/ejbiotechnology/article/view/v14n1-8.