Raksha, N., D. Gladun, O. Savchuk, and L. Ostapchenko. “Collagenolytic Activitiy in Tissue Extract of Parborlasia Corrugatus from Antarctic Region”. Biomedical Research and Therapy, Vol. 2, no. 9, Sept. 2015, pp. 354-8, http://www.bmrat.org/index.php/BMRAT/article/view/59.