Król, P., and B. Król. “Polyurethane Cationomers Synthesized from 4,4’-methylenebis(phenyl isocyanate), Polyoxypropylene Glycol and N-Alkyldiethanoloamines - Chemical Structures and Free Surface Energies and Its Components”. Polimery 52, no. 6 (August 26, 2022): 427-437. Accessed July 22, 2024. https://ichp.vot.pl/index.php/p/article/view/1435.