Janowski, B., and K. Pielichowski. “Nanohybrid polyurethane/Functionalized Silsesquioxane Systems. Part I. Structural Investigations Using FT-IR and NMR Methods”. Polimery, vol. 57, no. 7-8, Aug. 2012, pp. 518-2, http://ichp.vot.pl/index.php/p/article/view/848.