Kaya, I., and M. Kamaci. 2011. “Synthesis and Characterization of New poly(azomethine-Urethane) and Polyphenol Derivatives Obtained from 3,4-Dihydroxy Benzaldehyde and Hexamethylene Diisocyanate”. Polimery 56 (10):721-33. https://ichp.vot.pl/index.php/p/article/view/962.