Tartor, Y. H., and E. Y. El-naenaeey. “RT-PCR Detection of Exotoxin Genes Expression in Multidrug Resistant Pseudomonas Aeruginosa”. Cellular and Molecular Biology, vol. 62, no. 1, Jan. 2016, pp. 56-62, https://www.cellmolbiol.org/index.php/CMB/article/view/781.