Pilch-Pitera, B., and J. Wojturska. “Biodegradation of poly(ester Urethanes) under Simulated Composting Conditions”. Polimery, vol. 57, no. 11-12, Dec. 2012, pp. 852-60, https://polimery.ichp.vot.pl/index.php/p/article/view/882.