Chmiel-Szukiewicz, E. “Polyurethane Foams Based on Oligoetherols Obtained from 6-Aminouracil and Alkylene Carbonates”. Polimery, vol. 55, no. 11-12, Dec. 2010, pp. 817-24, http://ichp.vot.pl/index.php/p/article/view/1069.