Danylkovych, A., and V. Lishchuk. “An Improvement of the Technology of Manufacturing Supple Leather through Enzymatic Plasticizing of a Structured Semi-Finished Product”. Eastern-European Journal of Enterprise Technologies, vol. 4, no. 6(82), Aug. 2016, pp. 18-22, doi:10.15587/1729-4061.2016.73376.