Kushkevych, I. V. “Molecular Cloning CysK Gene from Escherichia Coli Genome, Transferring in the Intestinal Sulfate-Reducing Bacteria and the Expression Analysis of O-acetylserine(thiol)lyase”. Microbes and Health, vol. 4, no. 1, Dec. 2016, pp. 19-24, doi:10.3329/mh.v4i1.23089.