Leszkowski, K., M. Strankowski, A. Miszczyk, and J. T. Haponiuk. “The Mechanical Properties and Conduction of Solid Polyurethane Electrolytes Depending on the Methods of Synthesis and LiClO4 Content As Addition”. Polimery, vol. 56, no. 7-8, Aug. 2011, pp. 578-84, https://ichp.vot.pl/index.php/p/article/view/948.