B. Nowak, J. Pająk, S. Łabużek, G. Rymarz, and E. Talik, “Biodegradation of poly(ethylene terephthalate) modified with polyester "Bionolle®" by Penicillium funiculosum”, p, vol. 56, no. 1, pp. 35-44, Jan. 2011.