Javed, Anam, and Javed Iqbal Qazi. “Psychrophilic Microbial Enzymes Implications in Coming Biotechnological Processes”. American Scientific Research Journal for Engineering, Technology, and Sciences, vol. 23, no. 1, Aug. 2016, pp. 103-20, https://www.asrjetsjournal.org/American_Scientific_Journal/article/view/1916.