Spychaj, T., B. Schmidt, K. Ulfig, and A. Markowska-Szczupak. 2012. “Starch-Grafted-N-Vinylformamide Copolymers Manufactured by Reactive Extrusion: Synthesis and Characterization”. Polimery 57 (2):95-100. https://polimery.ichp.vot.pl/index.php/p/article/view/809.