Zhu, D., G. Cai, D. Wu, and J. Lu. “Comparison of Two Codon Optimization Strategies Enhancing Recombinant Sus Scrofa Lysozyme Production in Pichia Pastoris”. Cellular and Molecular Biology, vol. 61, no. 2, May 2015, pp. 43-49, https://www.cellmolbiol.org/index.php/CMB/article/view/649.