Bac, V. H., Thu Hang, D. T., Tai, L. T. and Truong, L. V. (2013) “High level expression of a gene coding for pectate lyase in Bacillus subtilis 168”, Academia Journal of Biology, 35(3), pp. 369–375. doi: 10.15625/0866-7160/v35n3.3393.