Heneczkowski, M., M. Oleksy, R. Oliwa, M. Dutkiewicz, H. Maciejewski, and H. Galina. 2013. “Application of Silsesquioxanes for Modification of Epoxy Resins”. Polimery 58 (10):759-65. https://ichp.vot.pl/index.php/p/article/view/783.